Remove the default format from ResourcePool.

cc/resources/tile_task_worker_pool.h

Index: cc/resources/tile_task_worker_pool.h
diff --git a/cc/resources/tile_task_worker_pool.h b/cc/resources/tile_task_worker_pool.h
index cb7d4b08776c384c746ac902db0037489f8c704a..ad4a938bbfe4354d12da414ddadc934a1bbeed70 100644
--- a/cc/resources/tile_task_worker_pool.h
+++ b/cc/resources/tile_task_worker_pool.h
@@ -80,6 +80,9 @@ class CC_EXPORT TileTaskWorkerPool {
 
   // Type-checking downcast routine.
   virtual TileTaskRunner* AsTileTaskRunner() = 0;
+
+  // Returns the most appropriate format to use.
+  virtual ResourceFormat GetResourceFormat() = 0;

[reveman, 2015/01/22 23:01:46]

How about we make this part of the TileTaskRunner interface instead so we can
avoid passing the format as a ctor parameter to the TileManager?

[peterp, 2015/01/23 13:19:06]

Good idea. Done.

 };
 
 }  // namespace cc