path: root/eglGetMscRateCHROMIUM.patch

From 5cddfb828ddd82fc741549d5ee44cd9b94bd97f5 Mon Sep 17 00:00:00 2001
From: Jonah Ryan-Davis <jonahr@google.com>
Date: Mon, 30 Mar 2020 17:13:54 +0000
Subject: [PATCH] Use EGL_ANGLE_sync_control_rate for eglGetMscRate call

eglGetMscRateCHROMIUM is not universally supported, so we will
switch to using the ANGLE version of the extension instead.

Bug: chromium:1064078
Change-Id: Ic57e2e55230df1d1c2c584e1cbf54331330a0b87
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120453
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Cr-Commit-Position: refs/heads/master@{#754518}
---

diff --git a/gpu/GLES2/extensions/ANGLE/EGL_ANGLE_sync_control_rate.txt b/gpu/GLES2/extensions/ANGLE/EGL_ANGLE_sync_control_rate.txt
new file mode 100644
index 0000000..2056ae8
--- /dev/null
+++ b/gpu/GLES2/extensions/ANGLE/EGL_ANGLE_sync_control_rate.txt
@@ -0,0 +1,110 @@
+Name
+
+   ANGLE_sync_control_rate
+
+Name Strings
+
+   EGL_ANGLE_sync_control_rate
+
+Contact
+
+   Jonah Ryan-Davis, Google (jonahr 'at' google.com)
+
+Status
+
+   Draft.
+
+Version
+
+   Version 1, 2020-03-24
+
+   Based on GLX_OML_sync_control Revision 6.0
+
+Number
+
+   ???
+
+Dependencies
+
+   The extension is written against the EGL 1.2 Specification, although it
+   should work on other versions of these specifications. This extension
+   also requires an operating system which supports CLOCK_MONOTONIC.
+
+Overview
+
+   This extension provides counters which let applications know about the
+   timing of the last vertical retrace. By looking at the system clock, as
+   well as the refresh rate of the monitor, this should enable applications
+   to predict the position of future retraces so as to schedule an optimal
+   workload.
+
+   This extension incorporates the use of three counters that provide
+   the necessary synchronization. The Unadjusted System Time (or UST)
+   is the 64-bit CLOCK_MONOTONIC clock; in particular this lets the
+   application schedule future vertical retraces by querying this clock.
+   The graphics Media Stream Counter (or graphics MSC) is a counter
+   that is unique to the graphics subsystem and increments for each
+   vertical retrace that occurs. The Swap Buffer Counter (SBC) is an
+   attribute of an EGLSurface and is incremented each time a swap
+   buffer action is performed on the associated surface.
+
+   The use of these three counters allows the application to
+   synchronize graphics rendering to vertical retraces and/or swap
+   buffer actions. For example, by querying the synchronization values for
+   a given surface, the application can accurately predict the timing for
+   the next vertical retraces and schedule rendering accordingly.
+
+Issues
+
+   None.
+
+IP Status
+
+   No known issues.
+
+New Procedures and Functions
+
+   Bool eglGetMscRateANGLE(EGLDisplay* dpy,
+                           EGLSurface surface,
+                           int32_t* numerator,
+                           int32_t* denominator)
+
+New Tokens
+
+   None
+
+Additions to the EGL 1.3 Specification
+
+   The graphics MSC value is incremented once for each screen refresh.
+   For a non-interlaced display, this means that the graphics MSC value
+   is incremented for each frame. For an interlaced display, it means
+   that it will be incremented for each field. For a multi-monitor
+   system, the monitor used to determine MSC is the one where the surface
+   is located. If the surface spans multiple monitors, the monitor used
+   to determine MSC is the one with the biggest coverage in pixels.
+
+   eglGetMscRateANGLE returns the rate at which the MSC will be incremented
+   for the display associated with <hdc>. The rate is expressed in Hertz
+   as <numerator> / <denominator>. If the MSC rate in Hertz is an
+   integer, then <denominator> will be 1 and <numerator> will be
+   the MSC rate.
+
+   The function eglGetMscRateANGLE will return TRUE if the function
+   completed successfully, FALSE otherwise.
+
+   Each time eglSwapBuffer succeeds, the SBC will be increased within a
+   finite time period.
+
+Errors
+
+   The function eglGetMscRateANGLE will return FALSE if there is no
+   current EGLContext.
+
+New Implementation Dependent State
+
+   None
+
+Revision History
+
+    Version 1, 2020-03-24 (Jonah Ryan-Davis)
+       - Initial draft, based on GLX_OML_sync_control revision 6.0.
diff --git a/gpu/GLES2/extensions/CHROMIUM/EGL_CHROMIUM_sync_control.txt b/gpu/GLES2/extensions/CHROMIUM/EGL_CHROMIUM_sync_control.txt
index 14f4e56..f699f61 100644
--- a/gpu/GLES2/extensions/CHROMIUM/EGL_CHROMIUM_sync_control.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/EGL_CHROMIUM_sync_control.txt
@@ -16,7 +16,7 @@
 
 Version
 
-   Version 3, 2020-01-23
+   Version 2, 2015-05-05
 
    Based on GLX_OML_sync_control Revision 6.0
 
@@ -70,12 +70,6 @@
                                  int64_t* msc,
                                  int64_t* sbc)
 
-   Bool eglGetMscRateCHROMIUM(EGLDisplay* dpy,
-                              EGLSurface surface,
-                              int32_t* numerator,
-                              int32_t* denominator)
-
-
 New Tokens
 
    None
@@ -112,22 +106,16 @@
    is located. If the surface spans multiple monitors, the monitor used
    to determine MSC is the one with the biggest coverage in pixels.
 
-   eglGetMscRateCHROMIUM returns the rate at which the MSC will be incremented
-   for the display associated with <hdc>. The rate is expressed in Hertz
-   as <numerator> / <denominator>. If the MSC rate in Hertz is an
-   integer, then <denominator> will be 1 and <numerator> will be
-   the MSC rate.
-
-   The functions eglGetSyncValuesCHROMIUM, and eglGetMscRateCHROMIUM will
-   return TRUE if the function completed successfully, FALSE otherwise.
+   The function eglGetSyncValuesCHROMIUM will return TRUE if the function
+   completed successfully, FALSE otherwise.
 
    Each time eglSwapBuffer succeeds, the SBC will be increased within a
    finite time period.
 
 Errors
 
-   The functions eglGetSyncValuesCHROMIUM, and eglGetMscRateCHROMIUM will
-   return FALSE if there is no current EGLContext.
+   The function eglGetSyncValuesCHROMIUM will return FALSE if there is no
+   current EGLContext.
 
 
 New State
@@ -144,10 +132,6 @@
 
 Revision History
 
-    Version 3, 2020-01-23 (Jonah Ryan-Davis)
-       - Add the function eglGetMscRateCHROMIUM based on glXGetMscRateOML from
-         GLX_OML_sync_control revision 6.0.
-
     Version 2, 2015-05-05 (Chad Versace)
        - Rename to EGL_CHROMIUM_sync_control from EGL_CHROMIUM_get_sync_values.
          EGL_CHROMIUM_sync_control is the de facto extension name because all
diff --git a/ui/gl/EGL/eglextchromium.h b/ui/gl/EGL/eglextchromium.h
index e66d34a..22e3cf0 100644
--- a/ui/gl/EGL/eglextchromium.h
+++ b/ui/gl/EGL/eglextchromium.h
@@ -22,21 +22,26 @@
 EGLAPI EGLBoolean EGLAPIENTRY eglGetSyncValuesCHROMIUM(
     EGLDisplay dpy, EGLSurface surface, EGLuint64CHROMIUM *ust,
     EGLuint64CHROMIUM *msc, EGLuint64CHROMIUM *sbc);
-EGLAPI EGLBoolean EGLAPIENTRY eglGetMscRateCHROMIUM(EGLDisplay dpy,
-                                                    EGLSurface surface,
-                                                    EGLint* numerator,
-                                                    EGLint* denominator);
 #endif /* EGL_EGLEXT_PROTOTYPES */
 typedef EGLBoolean (EGLAPIENTRYP PFNEGLGETSYNCVALUESCHROMIUMPROC)
     (EGLDisplay dpy, EGLSurface surface, EGLuint64CHROMIUM *ust,
      EGLuint64CHROMIUM *msc, EGLuint64CHROMIUM *sbc);
-typedef EGLBoolean(EGLAPIENTRYP PFNEGLGETMSCRATECHROMIUMPROC)(
-    EGLDisplay dpy,
-    EGLSurface surface,
-    EGLint* numerator,
-    EGLint* denominator);
-#endif
-#endif
+#endif /* EGL_CHROMIUM_sync_control */
+
+#ifndef EGL_ANGLE_sync_control_rate
+#define EGL_ANGLE_sync_control_rate 1
+#ifdef EGL_EGLEXT_PROTOTYPES
+EGLAPI EGLBoolean EGLAPIENTRY eglGetMscRateANGLE(EGLDisplay dpy,
+                                                 EGLSurface surface,
+                                                 EGLint* numerator,
+                                                 EGLint* denominator);
+#endif /* EGL_EGLEXT_PROTOTYPES */
+typedef EGLBoolean(EGLAPIENTRYP PFNEGLGETMSCRATEANGLEPROC)(EGLDisplay dpy,
+                                                           EGLSurface surface,
+                                                           EGLint* numerator,
+                                                           EGLint* denominator);
+#endif /* EGL_ANGLE_sync_control_rate */
+#endif /* KHRONOS_SUPPORT_INT64 */
 
 #ifdef __cplusplus
 }
diff --git a/ui/gl/egl_bindings_autogen_mock.cc b/ui/gl/egl_bindings_autogen_mock.cc
index f6562ad..d4d3a04 100644
--- a/ui/gl/egl_bindings_autogen_mock.cc
+++ b/ui/gl/egl_bindings_autogen_mock.cc
@@ -299,12 +299,12 @@
 }
 
 EGLBoolean GL_BINDING_CALL
-MockEGLInterface::Mock_eglGetMscRateCHROMIUM(EGLDisplay dpy,
-                                             EGLSurface surface,
-                                             EGLint* numerator,
-                                             EGLint* denominator) {
-  MakeEglMockFunctionUnique("eglGetMscRateCHROMIUM");
-  return interface_->GetMscRateCHROMIUM(dpy, surface, numerator, denominator);
+MockEGLInterface::Mock_eglGetMscRateANGLE(EGLDisplay dpy,
+                                          EGLSurface surface,
+                                          EGLint* numerator,
+                                          EGLint* denominator) {
+  MakeEglMockFunctionUnique("eglGetMscRateANGLE");
+  return interface_->GetMscRateANGLE(dpy, surface, numerator, denominator);
 }
 
 EGLClientBuffer GL_BINDING_CALL
@@ -706,8 +706,8 @@
   if (strcmp(name, "eglGetFrameTimestampsANDROID") == 0)
     return reinterpret_cast<GLFunctionPointerType>(
         Mock_eglGetFrameTimestampsANDROID);
-  if (strcmp(name, "eglGetMscRateCHROMIUM") == 0)
-    return reinterpret_cast<GLFunctionPointerType>(Mock_eglGetMscRateCHROMIUM);
+  if (strcmp(name, "eglGetMscRateANGLE") == 0)
+    return reinterpret_cast<GLFunctionPointerType>(Mock_eglGetMscRateANGLE);
   if (strcmp(name, "eglGetNativeClientBufferANDROID") == 0)
     return reinterpret_cast<GLFunctionPointerType>(
         Mock_eglGetNativeClientBufferANDROID);
diff --git a/ui/gl/egl_bindings_autogen_mock.h b/ui/gl/egl_bindings_autogen_mock.h
index 06f1117..4b7eb01 100644
--- a/ui/gl/egl_bindings_autogen_mock.h
+++ b/ui/gl/egl_bindings_autogen_mock.h
@@ -131,11 +131,10 @@
                                   EGLint numTimestamps,
                                   EGLint* timestamps,
                                   EGLnsecsANDROID* values);
-static EGLBoolean GL_BINDING_CALL
-Mock_eglGetMscRateCHROMIUM(EGLDisplay dpy,
-                           EGLSurface surface,
-                           EGLint* numerator,
-                           EGLint* denominator);
+static EGLBoolean GL_BINDING_CALL Mock_eglGetMscRateANGLE(EGLDisplay dpy,
+                                                          EGLSurface surface,
+                                                          EGLint* numerator,
+                                                          EGLint* denominator);
 static EGLClientBuffer GL_BINDING_CALL Mock_eglGetNativeClientBufferANDROID(
     const struct AHardwareBuffer* ahardwarebuffer);
 static EGLBoolean GL_BINDING_CALL
diff --git a/ui/gl/generate_bindings.py b/ui/gl/generate_bindings.py
index 6a89047..01da79a 100755
--- a/ui/gl/generate_bindings.py
+++ b/ui/gl/generate_bindings.py
@@ -2452,9 +2452,9 @@
                  ] }],
   'arguments': 'EGLDisplay dpy, EGLSurface surface, EGLint timestamp', },
 { 'return_type': 'EGLBoolean',
-  'versions': [{ 'name': 'eglGetMscRateCHROMIUM',
+  'versions': [{ 'name': 'eglGetMscRateANGLE',
                  'extensions': [
-                   'EGL_CHROMIUM_sync_control'
+                   'EGL_ANGLE_sync_control_rate'
                  ] }],
   'arguments':
       'EGLDisplay dpy, EGLSurface surface, '
diff --git a/ui/gl/gl_bindings_api_autogen_egl.h b/ui/gl/gl_bindings_api_autogen_egl.h
index 8628d7c..30b0ba80 100644
--- a/ui/gl/gl_bindings_api_autogen_egl.h
+++ b/ui/gl/gl_bindings_api_autogen_egl.h
@@ -111,10 +111,10 @@
 EGLBoolean eglGetFrameTimestampSupportedANDROIDFn(EGLDisplay dpy,
                                                   EGLSurface surface,
                                                   EGLint timestamp) override;
-EGLBoolean eglGetMscRateCHROMIUMFn(EGLDisplay dpy,
-                                   EGLSurface surface,
-                                   EGLint* numerator,
-                                   EGLint* denominator) override;
+EGLBoolean eglGetMscRateANGLEFn(EGLDisplay dpy,
+                                EGLSurface surface,
+                                EGLint* numerator,
+                                EGLint* denominator) override;
 EGLClientBuffer eglGetNativeClientBufferANDROIDFn(
     const struct AHardwareBuffer* ahardwarebuffer) override;
 EGLBoolean eglGetNextFrameIdANDROIDFn(EGLDisplay dpy,
diff --git a/ui/gl/gl_bindings_autogen_egl.cc b/ui/gl/gl_bindings_autogen_egl.cc
index 2f1ed11..18444223 100644
--- a/ui/gl/gl_bindings_autogen_egl.cc
+++ b/ui/gl/gl_bindings_autogen_egl.cc
@@ -187,6 +187,8 @@
       gfx::HasExtension(extensions, "EGL_ANGLE_stream_producer_d3d_texture");
   ext.b_EGL_ANGLE_surface_d3d_texture_2d_share_handle = gfx::HasExtension(
       extensions, "EGL_ANGLE_surface_d3d_texture_2d_share_handle");
+  ext.b_EGL_ANGLE_sync_control_rate =
+      gfx::HasExtension(extensions, "EGL_ANGLE_sync_control_rate");
   ext.b_EGL_CHROMIUM_sync_control =
       gfx::HasExtension(extensions, "EGL_CHROMIUM_sync_control");
   ext.b_EGL_EXT_image_flush_external =
@@ -278,9 +280,9 @@
             GetGLProcAddress("eglGetFrameTimestampSupportedANDROID"));
   }
 
-  if (ext.b_EGL_CHROMIUM_sync_control) {
-    fn.eglGetMscRateCHROMIUMFn = reinterpret_cast<eglGetMscRateCHROMIUMProc>(
-        GetGLProcAddress("eglGetMscRateCHROMIUM"));
+  if (ext.b_EGL_ANGLE_sync_control_rate) {
+    fn.eglGetMscRateANGLEFn = reinterpret_cast<eglGetMscRateANGLEProc>(
+        GetGLProcAddress("eglGetMscRateANGLE"));
   }
 
   if (ext.b_EGL_ANDROID_get_native_client_buffer) {
@@ -602,12 +604,11 @@
                                                             timestamp);
 }
 
-EGLBoolean EGLApiBase::eglGetMscRateCHROMIUMFn(EGLDisplay dpy,
-                                               EGLSurface surface,
-                                               EGLint* numerator,
-                                               EGLint* denominator) {
-  return driver_->fn.eglGetMscRateCHROMIUMFn(dpy, surface, numerator,
-                                             denominator);
+EGLBoolean EGLApiBase::eglGetMscRateANGLEFn(EGLDisplay dpy,
+                                            EGLSurface surface,
+                                            EGLint* numerator,
+                                            EGLint* denominator) {
+  return driver_->fn.eglGetMscRateANGLEFn(dpy, surface, numerator, denominator);
 }
 
 EGLClientBuffer EGLApiBase::eglGetNativeClientBufferANDROIDFn(
@@ -1117,13 +1118,12 @@
                                                           timestamp);
 }
 
-EGLBoolean TraceEGLApi::eglGetMscRateCHROMIUMFn(EGLDisplay dpy,
-                                                EGLSurface surface,
-                                                EGLint* numerator,
-                                                EGLint* denominator) {
-  TRACE_EVENT_BINARY_EFFICIENT0("gpu", "TraceEGLAPI::eglGetMscRateCHROMIUM")
-  return egl_api_->eglGetMscRateCHROMIUMFn(dpy, surface, numerator,
-                                           denominator);
+EGLBoolean TraceEGLApi::eglGetMscRateANGLEFn(EGLDisplay dpy,
+                                             EGLSurface surface,
+                                             EGLint* numerator,
+                                             EGLint* denominator) {
+  TRACE_EVENT_BINARY_EFFICIENT0("gpu", "TraceEGLAPI::eglGetMscRateANGLE")
+  return egl_api_->eglGetMscRateANGLEFn(dpy, surface, numerator, denominator);
 }
 
 EGLClientBuffer TraceEGLApi::eglGetNativeClientBufferANDROIDFn(
@@ -1811,16 +1811,16 @@
   return result;
 }
 
-EGLBoolean LogEGLApi::eglGetMscRateCHROMIUMFn(EGLDisplay dpy,
-                                              EGLSurface surface,
-                                              EGLint* numerator,
-                                              EGLint* denominator) {
-  GL_SERVICE_LOG("eglGetMscRateCHROMIUM"
+EGLBoolean LogEGLApi::eglGetMscRateANGLEFn(EGLDisplay dpy,
+                                           EGLSurface surface,
+                                           EGLint* numerator,
+                                           EGLint* denominator) {
+  GL_SERVICE_LOG("eglGetMscRateANGLE"
                  << "(" << dpy << ", " << surface << ", "
                  << static_cast<const void*>(numerator) << ", "
                  << static_cast<const void*>(denominator) << ")");
   EGLBoolean result =
-      egl_api_->eglGetMscRateCHROMIUMFn(dpy, surface, numerator, denominator);
+      egl_api_->eglGetMscRateANGLEFn(dpy, surface, numerator, denominator);
   GL_SERVICE_LOG("GL_RESULT: " << result);
   return result;
 }
diff --git a/ui/gl/gl_bindings_autogen_egl.h b/ui/gl/gl_bindings_autogen_egl.h
index 546e2c9..6cafd14 100644
--- a/ui/gl/gl_bindings_autogen_egl.h
+++ b/ui/gl/gl_bindings_autogen_egl.h
@@ -141,7 +141,7 @@
     EGLDisplay dpy,
     EGLSurface surface,
     EGLint timestamp);
-typedef EGLBoolean(GL_BINDING_CALL* eglGetMscRateCHROMIUMProc)(
+typedef EGLBoolean(GL_BINDING_CALL* eglGetMscRateANGLEProc)(
     EGLDisplay dpy,
     EGLSurface surface,
     EGLint* numerator,
@@ -296,6 +296,7 @@
   bool b_EGL_ANGLE_query_surface_pointer;
   bool b_EGL_ANGLE_stream_producer_d3d_texture;
   bool b_EGL_ANGLE_surface_d3d_texture_2d_share_handle;
+  bool b_EGL_ANGLE_sync_control_rate;
   bool b_EGL_CHROMIUM_sync_control;
   bool b_EGL_EXT_image_flush_external;
   bool b_EGL_KHR_fence_sync;
@@ -351,7 +352,7 @@
   eglGetFrameTimestampsANDROIDProc eglGetFrameTimestampsANDROIDFn;
   eglGetFrameTimestampSupportedANDROIDProc
       eglGetFrameTimestampSupportedANDROIDFn;
-  eglGetMscRateCHROMIUMProc eglGetMscRateCHROMIUMFn;
+  eglGetMscRateANGLEProc eglGetMscRateANGLEFn;
   eglGetNativeClientBufferANDROIDProc eglGetNativeClientBufferANDROIDFn;
   eglGetNextFrameIdANDROIDProc eglGetNextFrameIdANDROIDFn;
   eglGetPlatformDisplayProc eglGetPlatformDisplayFn;
@@ -512,10 +513,10 @@
       EGLDisplay dpy,
       EGLSurface surface,
       EGLint timestamp) = 0;
-  virtual EGLBoolean eglGetMscRateCHROMIUMFn(EGLDisplay dpy,
-                                             EGLSurface surface,
-                                             EGLint* numerator,
-                                             EGLint* denominator) = 0;
+  virtual EGLBoolean eglGetMscRateANGLEFn(EGLDisplay dpy,
+                                          EGLSurface surface,
+                                          EGLint* numerator,
+                                          EGLint* denominator) = 0;
   virtual EGLClientBuffer eglGetNativeClientBufferANDROIDFn(
       const struct AHardwareBuffer* ahardwarebuffer) = 0;
   virtual EGLBoolean eglGetNextFrameIdANDROIDFn(EGLDisplay dpy,
@@ -685,8 +686,7 @@
   ::gl::g_current_egl_context->eglGetFrameTimestampsANDROIDFn
 #define eglGetFrameTimestampSupportedANDROID \
   ::gl::g_current_egl_context->eglGetFrameTimestampSupportedANDROIDFn
-#define eglGetMscRateCHROMIUM \
-  ::gl::g_current_egl_context->eglGetMscRateCHROMIUMFn
+#define eglGetMscRateANGLE ::gl::g_current_egl_context->eglGetMscRateANGLEFn
 #define eglGetNativeClientBufferANDROID \
   ::gl::g_current_egl_context->eglGetNativeClientBufferANDROIDFn
 #define eglGetNextFrameIdANDROID \
diff --git a/ui/gl/gl_enums_implementation_autogen.h b/ui/gl/gl_enums_implementation_autogen.h
index d35439c..1209923b 100644
--- a/ui/gl/gl_enums_implementation_autogen.h
+++ b/ui/gl/gl_enums_implementation_autogen.h
@@ -829,10 +829,6 @@
         "GL_FILL_NV",
     },
     {
-        0x1D00,
-        "GL_FLAT_CHROMIUM",
-    },
-    {
         0x1E00,
         "GL_KEEP",
     },
@@ -877,14 +873,6 @@
         "GL_FONT_NUM_GLYPH_INDICES_BIT_NV",
     },
     {
-        0x2400,
-        "GL_EYE_LINEAR_CHROMIUM",
-    },
-    {
-        0x2401,
-        "GL_OBJECT_LINEAR_CHROMIUM",
-    },
-    {
         0x2600,
         "GL_NEAREST",
     },
@@ -2053,10 +2041,6 @@
         "GL_MAX_CUBE_MAP_TEXTURE_SIZE",
     },
     {
-        0x8576,
-        "GL_CONSTANT_CHROMIUM",
-    },
-    {
         0x8589,
         "GL_SRC1_ALPHA_EXT",
     },
@@ -4629,10 +4613,6 @@
         "GL_PATH_CLIENT_LENGTH_NV",
     },
     {
-        0x907a,
-        "GL_PATH_MITER_LIMIT_CHROMIUM",
-    },
-    {
         0x9080,
         "GL_PATH_FILL_MODE_NV",
     },
@@ -4653,10 +4633,6 @@
         "GL_PATH_STROKE_MASK_NV",
     },
     {
-        0x9086,
-        "GL_PATH_STROKE_BOUND_CHROMIUM",
-    },
-    {
         0x9088,
         "GL_COUNT_UP_NV",
     },
@@ -4965,14 +4941,6 @@
         "GL_CONTEXT_ROBUST_ACCESS_KHR",
     },
     {
-        0x90a3,
-        "GL_SQUARE_CHROMIUM",
-    },
-    {
-        0x90a4,
-        "GL_ROUND_CHROMIUM",
-    },
-    {
         0x9100,
         "GL_TEXTURE_2D_MULTISAMPLE",
     },
diff --git a/ui/gl/gl_mock_autogen_egl.h b/ui/gl/gl_mock_autogen_egl.h
index bcdd2a3..ba2f95f 100644
--- a/ui/gl/gl_mock_autogen_egl.h
+++ b/ui/gl/gl_mock_autogen_egl.h
@@ -121,7 +121,7 @@
                         EGLnsecsANDROID* values));
 MOCK_METHOD3(GetFrameTimestampSupportedANDROID,
              EGLBoolean(EGLDisplay dpy, EGLSurface surface, EGLint timestamp));
-MOCK_METHOD4(GetMscRateCHROMIUM,
+MOCK_METHOD4(GetMscRateANGLE,
              EGLBoolean(EGLDisplay dpy,
                         EGLSurface surface,
                         EGLint* numerator,
diff --git a/ui/gl/gl_surface_egl.cc b/ui/gl/gl_surface_egl.cc
index 72268904..750f3ed 100644
--- a/ui/gl/gl_surface_egl.cc
+++ b/ui/gl/gl_surface_egl.cc
@@ -174,6 +174,7 @@
 bool g_egl_create_context_bind_generates_resource_supported = false;
 bool g_egl_create_context_webgl_compatability_supported = false;
 bool g_egl_sync_control_supported = false;
+bool g_egl_sync_control_rate_supported = false;
 bool g_egl_window_fixed_size_supported = false;
 bool g_egl_surfaceless_context_supported = false;
 bool g_egl_surface_orientation_supported = false;
@@ -266,8 +267,12 @@
   }
 
   bool GetMscRate(int32_t* numerator, int32_t* denominator) override {
+    if (!g_egl_sync_control_rate_supported) {
+      return false;
+    }
+ 
-    bool result = eglGetMscRateCHROMIUM(g_egl_display, surface_, numerator,
-                                        denominator) == EGL_TRUE;
+    bool result = eglGetMscRateANGLE(g_egl_display, surface_, numerator,
+                                     denominator) == EGL_TRUE;
     return result;
   }
 
@@ -921,6 +920,8 @@
   g_egl_create_context_webgl_compatability_supported =
       HasEGLExtension("EGL_ANGLE_create_context_webgl_compatibility");
   g_egl_sync_control_supported = HasEGLExtension("EGL_CHROMIUM_sync_control");
+  g_egl_sync_control_rate_supported =
+      HasEGLExtension("EGL_ANGLE_sync_control_rate");
   g_egl_window_fixed_size_supported =
       HasEGLExtension("EGL_ANGLE_window_fixed_size");
   g_egl_surface_orientation_supported =
@@ -1036,6 +1037,7 @@
   g_egl_create_context_bind_generates_resource_supported = false;
   g_egl_create_context_webgl_compatability_supported = false;
   g_egl_sync_control_supported = false;
+  g_egl_sync_control_rate_supported = false;
   g_egl_window_fixed_size_supported = false;
   g_egl_surface_orientation_supported = false;
   g_egl_surfaceless_context_supported = false;