Route DXGI Frame Statistics to VSyncProvider

ui/gl/gl_surface_egl.h

Index: ui/gl/gl_surface_egl.h
diff --git a/ui/gl/gl_surface_egl.h b/ui/gl/gl_surface_egl.h
index 3bb14e7a1eed4a0cb66d5c2933216281d2d836d4..474032a7fba37e4d099b89a1c845b6c9f837cb4f 100644
--- a/ui/gl/gl_surface_egl.h
+++ b/ui/gl/gl_surface_egl.h
@@ -24,6 +24,7 @@
 #include "ui/gl/gl_export.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_surface_overlay.h"
+#include "ui/gl/sync_control_vsync_provider.h"
 
 namespace gl {
 
@@ -45,6 +46,25 @@ GL_EXPORT void GetEGLInitDisplays(bool supports_angle_d3d,
                                   const base::CommandLine* command_line,
                                   std::vector<DisplayType>* init_displays);
 
+// VSync provider for EGL surface;
+class GL_EXPORT EGLSyncControlVSyncProvider : public SyncControlVSyncProvider {
+ public:
+  explicit EGLSyncControlVSyncProvider(EGLSurface surface);
+  ~EGLSyncControlVSyncProvider() override;
+
+ protected:
+  bool GetSyncValues(int64_t* system_time,
+                     int64_t* media_stream_counter,
+                     int64_t* swap_buffer_counter) override;
+
+  bool GetMscRate(int32_t* numerator, int32_t* denominator) override;
+
+ private:
+  EGLSurface surface_;
+
+  DISALLOW_COPY_AND_ASSIGN(EGLSyncControlVSyncProvider);
+};
+
 // Interface for EGL surface.
 class GL_EXPORT GLSurfaceEGL : public GLSurface {
  public: