Tiling priorities in Android Webview.

cc/output/output_surface.h

Index: cc/output/output_surface.h
diff --git a/cc/output/output_surface.h b/cc/output/output_surface.h
index cec247dcff9b505900dd1999024d155a9934e4f1..f3a874ac458b064486cd6335466728049738484f 100644
--- a/cc/output/output_surface.h
+++ b/cc/output/output_surface.h
@@ -161,10 +161,13 @@ class CC_EXPORT OutputSurface {
   void ReclaimResources(const CompositorFrameAck* ack);
   void DidLoseOutputSurface();
   void SetExternalStencilTest(bool enabled);
-  void SetExternalDrawConstraints(const gfx::Transform& transform,
-                                  const gfx::Rect& viewport,
-                                  const gfx::Rect& clip,
-                                  bool resourceless_software_draw);
+  void SetExternalDrawConstraints(
+      const gfx::Transform& transform,
+      const gfx::Rect& viewport,
+      const gfx::Rect& clip,
+      const gfx::Rect& viewport_rect_for_tile_priority,
+      const gfx::Transform& transform_for_tile_priority,
+      bool resourceless_software_draw);
 
  private:
   void SetUpContext3d();