Add support to send optimal format as part of ScheduleOverlayPlane

cc/test/test_context_support.h

Index: cc/test/test_context_support.h
diff --git a/cc/test/test_context_support.h b/cc/test/test_context_support.h
index f619ac18281b57694ed8d103610f7233e9982076..597befd7aafb7d6844550c363cf953c8ab9223b8 100644
--- a/cc/test/test_context_support.h
+++ b/cc/test/test_context_support.h
@@ -36,18 +36,22 @@ class TestContextSupport : public gpu::ContextSupport {
   void RetireSyncPointCHROMIUM(uint32 sync_point) override;
   void ScheduleOverlayPlane(int plane_z_order,
                             gfx::OverlayTransform plane_transform,
+                            gfx::BufferFormat storage_format,
                             unsigned overlay_texture_id,
                             const gfx::Rect& display_bounds,
-                            const gfx::RectF& uv_rect) override;
+                            const gfx::RectF& uv_rect,
+                            bool handle_scaling) override;
   uint64_t ShareGroupTracingGUID() const override;
 
   void CallAllSyncPointCallbacks();
 
   typedef base::Callback<void(int plane_z_order,
                               gfx::OverlayTransform plane_transform,
+                              gfx::BufferFormat storage_format,
                               unsigned overlay_texture_id,
                               const gfx::Rect& display_bounds,
-                              const gfx::RectF& crop_rect)>
+                              const gfx::RectF& crop_rect,
+                              bool handle_scaling)>
       ScheduleOverlayPlaneCallback;
   void SetScheduleOverlayPlaneCallback(
       const ScheduleOverlayPlaneCallback& schedule_overlay_plane_callback);