Determine mask UVs based on texture size

cc/layers/layer_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 125 matching lines @@
   virtual void DidDraw(ResourceProvider* resource_provider);
 
   // Verify that the resource ids in the quad are valid.
   void ValidateQuadResources(DrawQuad* quad) const {
 #if DCHECK_IS_ON()
     ValidateQuadResourcesInternal(quad);
 #endif
   }
 
   virtual void GetContentsResourceId(ResourceId* resource_id,
-                                     gfx::Size* resource_size) const;
+                                     gfx::Size* resource_size,
+                                     gfx::SizeF* resource_uv_size) const;
 
   virtual void NotifyTileStateChanged(const Tile* tile) {}
 
   virtual ScrollbarLayerImplBase* ToScrollbarLayer();
 
   // Returns true if this layer has content to draw.
   void SetDrawsContent(bool draws_content);
   bool DrawsContent() const { return draws_content_; }
 
   LayerImplTestProperties* test_properties() {
@@ skipping 400 matching lines @@
   bool needs_show_scrollbars_ : 1;
 
   bool raster_even_if_not_in_rsll_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_