Mac: Partially enable partial swap

content/common/gpu/image_transport_surface_calayer_mac.h

Index: content/common/gpu/image_transport_surface_calayer_mac.h
diff --git a/content/common/gpu/image_transport_surface_calayer_mac.h b/content/common/gpu/image_transport_surface_calayer_mac.h
index e3416610a0d9bc342090a249e0c1a17a262c1de9..43cd2afb4f133ecaf65cf21d1daed6fa2a77d156 100644
--- a/content/common/gpu/image_transport_surface_calayer_mac.h
+++ b/content/common/gpu/image_transport_surface_calayer_mac.h
@@ -29,7 +29,9 @@ class CALayerStorageProvider
       CGLContextObj context, const base::Closure& context_dirtied_callback,
       GLuint texture, gfx::Size pixel_size, float scale_factor) override;
   void FreeColorBufferStorage() override;
-  void SwapBuffers(const gfx::Size& size, float scale_factor) override;
+  void FrameSizeChanged(
+      const gfx::Size& pixel_size, float scale_factor) override;
+  void SwapBuffers() override;
   void WillWriteToBackbuffer() override;
   void DiscardBackbuffer() override;
   void SwapBuffersAckedByBrowser(bool disable_throttling) override;