Support single-threaded impl-side painting

cc/resources/tile_manager_perftest.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 "base/time/time.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/resources/raster_buffer.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/begin_frame_args_test.h"
@@ skipping 35 matching lines @@
          ++it) {
       RasterTask* task = it->task;
 
       task->WillSchedule();
       task->ScheduleOnOriginThread(this);
       task->DidSchedule();
 
       completed_tasks_.push_back(task);
     }
   }
+  void WaitForTasksToFinishRunning() override {
+    // Everything completes instantly; nothing to do.
+  }
   void CheckForCompletedTasks() override {
     for (RasterTask::Vector::iterator it = completed_tasks_.begin();
          it != completed_tasks_.end();
          ++it) {
       RasterTask* task = it->get();
 
       task->WillComplete();
       task->CompleteOnOriginThread(this);
       task->DidComplete();
 
@@ skipping 420 matching lines @@
   RunEvictionQueueConstructAndIterateTest("10_128", 10, 128);
   RunEvictionQueueConstructAndIterateTest("50_16", 50, 16);
   RunEvictionQueueConstructAndIterateTest("50_32", 50, 32);
   RunEvictionQueueConstructAndIterateTest("50_64", 50, 64);
   RunEvictionQueueConstructAndIterateTest("50_128", 50, 128);
 }
 
 }  // namespace
 
 }  // namespace cc