Update from chromium https://crrev.com/301725/

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index f6927027a8b7e80376a8e266548988d6ca2d8aee..17da548c916ae4e8e9903642f953a8f70aa5335d 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -38,11 +38,13 @@ class CC_EXPORT PictureLayerTilingClient {
   virtual scoped_refptr<Tile> CreateTile(
     PictureLayerTiling* tiling,
     const gfx::Rect& content_rect) = 0;
-  virtual PicturePileImpl* GetPile() = 0;
+  virtual RasterSource* GetRasterSource() = 0;
   virtual gfx::Size CalculateTileSize(
     const gfx::Size& content_bounds) const = 0;
-  virtual const Region* GetInvalidation() = 0;
-  virtual const PictureLayerTiling* GetTwinTiling(
+  // This invalidation region defines the area (if any, it can by null) that
+  // tiles can not be shared between pending and active trees.
+  virtual const Region* GetPendingInvalidation() = 0;
+  virtual const PictureLayerTiling* GetPendingOrActiveTwinTiling(
       const PictureLayerTiling* tiling) const = 0;
   virtual PictureLayerTiling* GetRecycledTwinTiling(
       const PictureLayerTiling* tiling) = 0;