Raster PictureLayerTiling with fractional translation

cc/tiles/picture_layer_tiling_set.h

Index: cc/tiles/picture_layer_tiling_set.h
diff --git a/cc/tiles/picture_layer_tiling_set.h b/cc/tiles/picture_layer_tiling_set.h
index dfa059265228416d67c1920dc6c4b98d346cfe97..de79fce3e760008182e4bf9845619c750e164718 100644
--- a/cc/tiles/picture_layer_tiling_set.h
+++ b/cc/tiles/picture_layer_tiling_set.h
@@ -76,7 +76,7 @@ class CC_EXPORT PictureLayerTilingSet {
       scoped_refptr<RasterSource> raster_source,
       const Region& layer_invalidation);
 
-  PictureLayerTiling* AddTiling(float contents_scale,
+  PictureLayerTiling* AddTiling(const ScaleTranslate2d& contents_transform,
                                 scoped_refptr<RasterSource> raster_source);
   size_t num_tilings() const { return tilings_.size(); }
   int NumHighResTilings() const;
@@ -114,6 +114,9 @@ class CC_EXPORT PictureLayerTilingSet {
   // Remove all tiles; keep all tilings.
   void RemoveAllTiles();
 
+  // Remove one tiling.
+  void Remove(PictureLayerTiling* tiling);
+
   // Update the rects and priorities for tiles based on the given information.
   // Returns true if PrepareTiles is required.
   bool UpdateTilePriorities(const gfx::Rect& required_rect_in_layer_space,
@@ -213,8 +216,6 @@ class CC_EXPORT PictureLayerTilingSet {
       scoped_refptr<RasterSource> raster_source,
       const Region& layer_invalidation);
 
-  // Remove one tiling.
-  void Remove(PictureLayerTiling* tiling);
   void VerifyTilings(const PictureLayerTilingSet* pending_twin_set) const;
 
   bool TilingsNeedUpdate(const gfx::Rect& required_rect_in_layer_space,