Plumb overlay processing into DirectRenderer.

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index 225a43a0951f6a88a36c92451f2b1af0c3e4b772..bd5ee0401964aed0573cd1c42b1a9cf26e6b169c 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -220,6 +220,11 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   virtual void SetSwapBuffersCompleteCallback(
       const base::Closure& swap_buffers_complete_callback)
           OVERRIDE;
+  virtual void ScheduleOverlayPlane(int plane_z_order,
+                                    unsigned plane_transform,
+                                    unsigned overlay_texture_id,
+                                    const gfx::Rect& display_bounds,
+                                    const gfx::RectF& uv_rect) OVERRIDE;
 
   void GetProgramInfoCHROMIUMHelper(GLuint program, std::vector<int8>* result);
   GLint GetAttribLocationHelper(GLuint program, const char* name);