cc: Add checker-imaging support to TileManager.

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 211ae54f3dfa3b199de441a61ed0f4237a459240..608c43c2ba3850429969f3e06fa21a228deedd32 100644
--- a/cc/tiles/picture_layer_tiling_set.h
+++ b/cc/tiles/picture_layer_tiling_set.h
@@ -78,6 +78,8 @@ class CC_EXPORT PictureLayerTilingSet {
       scoped_refptr<RasterSource> raster_source,
       const Region& layer_invalidation);
 
+  void UpdateTilingsForImplSideInvalidation(const Region& layer_invalidation);
+
   PictureLayerTiling* AddTiling(float contents_scale,
                                 scoped_refptr<RasterSource> raster_source);
   size_t num_tilings() const { return tilings_.size(); }