Remove the default format from ResourcePool.

cc/resources/zero_copy_tile_task_worker_pool.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/zero_copy_tile_task_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/debug/trace_event_argument.h"
@@ skipping 55 matching lines @@
       task_set_finished_weak_ptr_factory_(this) {
 }
 
 ZeroCopyTileTaskWorkerPool::~ZeroCopyTileTaskWorkerPool() {
 }
 
 TileTaskRunner* ZeroCopyTileTaskWorkerPool::AsTileTaskRunner() {
   return this;
 }
 
+ResourceFormat ZeroCopyTileTaskWorkerPool::GetResourceFormat() {
+  return resource_provider_->best_texture_format();
+}
+
 void ZeroCopyTileTaskWorkerPool::SetClient(TileTaskRunnerClient* client) {
   client_ = client;
 }
 
 void ZeroCopyTileTaskWorkerPool::Shutdown() {
   TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::Shutdown");
 
   TaskGraph empty;
   task_graph_runner_->ScheduleTasks(namespace_token_, &empty);
   task_graph_runner_->WaitForTasksToFinishRunning(namespace_token_);
@@ skipping 111 matching lines @@
       new base::debug::TracedValue();
 
   state->BeginArray("tasks_pending");
   for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set)
     state->AppendBoolean(tasks_pending_[task_set]);
   state->EndArray();
   return state;
 }
 
 }  // namespace cc