(not for commit) Simplified multi-threaded Ganesh with lock on Flush only.

cc/test/fake_tile_manager.cc

 // Copyright 2012 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/test/fake_tile_manager.h"
 
 #include <deque>
 #include <limits>
 
 #include "base/lazy_instance.h"
 #include "cc/resources/raster_buffer.h"
 #include "cc/resources/tile_task_runner.h"
 
 namespace cc {
 
 namespace {
 
 class FakeTileTaskRunnerImpl : public TileTaskRunner, public TileTaskClient {
  public:
   // Overridden from TileTaskRunner:
   void SetClient(TileTaskRunnerClient* client) override {}
   void Shutdown() override {}
   void ScheduleTasks(TileTaskQueue* queue) override {
-    for (TileTaskQueue::Item::Vector::const_iterator it = queue->items.begin();
-         it != queue->items.end(); ++it) {
-      RasterTask* task = it->task;
+    for (auto& item : queue->items) {
+      RasterTask* task = item.task->AsRasterTask();
 
       task->WillSchedule();
       task->ScheduleOnOriginThread(this);
       task->DidSchedule();
 
       completed_tasks_.push_back(task);
     }
   }
   void CheckForCompletedTasks() override {
-    for (RasterTask::Vector::iterator it = completed_tasks_.begin();
-         it != completed_tasks_.end();
-         ++it) {
-      RasterTask* task = it->get();
-
+    for (auto& task : completed_tasks_) {
       task->WillComplete();
       task->CompleteOnOriginThread(this);
       task->DidComplete();
 
       task->RunReplyOnOriginThread();
     }
     completed_tasks_.clear();
   }
   ResourceFormat GetResourceFormat() override { return RGBA_8888; }
 
@@ skipping 40 matching lines @@
 }
 
 void FakeTileManager::Release(Tile* tile) {
   TileManager::Release(tile);
 
   FreeResourcesForReleasedTiles();
   CleanUpReleasedTiles();
 }
 
 }  // namespace cc