Rebind EGL context to flush driver caches.

gpu/command_buffer/client/gles2_implementation_impl_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_impl_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
index 79a7650709a7b73ebf7a01b8a151cd2a26b65066..367fa4bdbe65f84e4334a3e83bc1662fc6f07367 100644
--- a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
@@ -3441,6 +3441,14 @@ void GLES2Implementation::ScheduleOverlayPlaneCHROMIUM(
   CheckGLError();
 }
 
+void GLES2Implementation::FlushDriverCachesCHROMIUM() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glFlushDriverCachesCHROMIUM("
+                     << ")");
+  helper_->FlushDriverCachesCHROMIUM();
+  CheckGLError();
+}
+
 void GLES2Implementation::MatrixLoadfCHROMIUM(GLenum matrixMode,
                                               const GLfloat* m) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();