Remove the default format from ResourcePool.

cc/resources/one_copy_tile_task_worker_pool.h

Index: cc/resources/one_copy_tile_task_worker_pool.h
diff --git a/cc/resources/one_copy_tile_task_worker_pool.h b/cc/resources/one_copy_tile_task_worker_pool.h
index c5b30baec4d4c62c3d3a7a624268a8ea0f5bc607..01d69b8883d5d79986ae4bd5aecc7f0c2ebc7b62 100644
--- a/cc/resources/one_copy_tile_task_worker_pool.h
+++ b/cc/resources/one_copy_tile_task_worker_pool.h
@@ -38,7 +38,8 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
       TaskGraphRunner* task_graph_runner,
       ContextProvider* context_provider,
       ResourceProvider* resource_provider,
-      ResourcePool* resource_pool);
+      ResourcePool* resource_pool,
+      ResourceFormat resource_format);
 
   // Overridden from TileTaskWorkerPool:
   TileTaskRunner* AsTileTaskRunner() override;
@@ -73,7 +74,8 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
                             TaskGraphRunner* task_graph_runner,
                             ContextProvider* context_provider,
                             ResourceProvider* resource_provider,
-                            ResourcePool* resource_pool);
+                            ResourcePool* resource_pool,
+                            ResourceFormat resource_format);
 
  private:
   struct CopyOperation {
@@ -106,6 +108,7 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
   ContextProvider* context_provider_;
   ResourceProvider* resource_provider_;
   ResourcePool* resource_pool_;
+  ResourceFormat resource_format_;
   TaskSetCollection tasks_pending_;
   scoped_refptr<TileTask> task_set_finished_tasks_[kNumberOfTaskSets];
   CopySequenceNumber last_issued_copy_operation_;