[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 93316fbc363110cf98cc8b6a9996045000f827b4..c13a8a09800ef70ee3366f7be67755e0f8962d7e 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -109,12 +109,13 @@ class CC_EXPORT PictureLayerImpl
   PictureLayerImpl(LayerTreeImpl* tree_impl,
                    int id,
                    Layer::LayerMaskType mask_type);
-  PictureLayerTiling* AddTiling(float contents_scale);
+  PictureLayerTiling* AddTiling(const gfx::AxisTransform2d& 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;