[5/5] Add translated rasterization for PictureLayerImpl

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 fe2cfdc62c0644bd68861e01d90ac527184a7e4f..fe801164741c1352598f66b3c4b8039e077c836c 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -104,12 +104,13 @@ class CC_EXPORT PictureLayerImpl
 
  protected:
   PictureLayerImpl(LayerTreeImpl* tree_impl, int id, bool is_mask);
-  PictureLayerTiling* AddTiling(float contents_scale);
+  PictureLayerTiling* AddTiling(const ScaleTranslate2d& contents_transform);
   void RemoveAllTilings();
   void AddTilingsForRasterScale();
   void AddLowResolutionTilingIfNeeded();
   bool ShouldAdjustRasterScale() const;
   void RecalculateRasterScales();
+  gfx::Vector2dF CalculateRasterTranslation(float raster_scale);
   void CleanUpTilingsOnActiveLayer(
       const std::vector<PictureLayerTiling*>& used_tilings);
   float MinimumContentsScale() const;