cc: Optimize decode scheduling for checker-images.

cc/tiles/prioritized_tile.h

Index: cc/tiles/prioritized_tile.h
diff --git a/cc/tiles/prioritized_tile.h b/cc/tiles/prioritized_tile.h
index 7decc73cca1c5d8ee4828769272b78686e4cac6b..a2996602c7f83652bb9af268e73299e59a4ad3a5 100644
--- a/cc/tiles/prioritized_tile.h
+++ b/cc/tiles/prioritized_tile.h
@@ -24,7 +24,8 @@ class CC_EXPORT PrioritizedTile {
                   const PictureLayerTiling* source_tiling,
                   const TilePriority& priority,
                   bool is_occluded,
-                  bool is_process_for_images_only);
+                  bool is_process_for_images_only,
+                  bool should_decode_checkered_images_for_tile);
   ~PrioritizedTile();
 
   Tile* tile() const { return tile_; }
@@ -36,6 +37,9 @@ class CC_EXPORT PrioritizedTile {
   bool is_process_for_images_only() const {
     return is_process_for_images_only_;
   }
+  bool should_decode_checkered_images_for_tile() const {
+    return should_decode_checkered_images_for_tile_;
+  }
 
   void AsValueInto(base::trace_event::TracedValue* value) const;
 
@@ -45,6 +49,7 @@ class CC_EXPORT PrioritizedTile {
   TilePriority priority_;
   bool is_occluded_ = false;
   bool is_process_for_images_only_ = false;
+  bool should_decode_checkered_images_for_tile_ = false;
 };
 
 }  // namespace cc