Cache viewport rect for tile priority in UpdateTiles

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index 57947cc0775523a30bb857e99c199c8d0615a4bf..7590903d171668b60b9ac6cba314304799899e74 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -119,7 +119,10 @@ class CC_EXPORT PictureLayerImpl
   float MinimumContentsScale() const;
   float MaximumContentsScale() const;
   void ResetRasterScale();
-  gfx::Rect GetViewportForTilePriorityInContentSpace() const;
+  gfx::Rect viewport_rect_for_tile_priority_in_content_space() const {

[danakj, 2015/01/21 22:32:18]

I meant you can have this accessor on the FakePictureLayerImpl. You don't need
to make it public here.

[hush (inactive), 2015/01/21 22:40:46]

Oh. I see. Done.

+    return viewport_rect_for_tile_priority_in_content_space_;
+  }
+  void CacheViewportForTilePriorityInContentSpace();
   PictureLayerImpl* GetRecycledTwinLayer() const;
 
   void SanityCheckTilingState() const;
@@ -173,6 +176,7 @@ class CC_EXPORT PictureLayerImpl
   // from regular draws. Save a copy of the required draw properties of the last
   // frame that has a valid viewport for prioritizing tiles.
   gfx::Rect visible_rect_for_tile_priority_;
+  gfx::Rect viewport_rect_for_tile_priority_in_content_space_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };