cc: Remove FakeThread, use SingleThreadTaskRunner in scheduling classes.

cc/scheduler/frame_rate_controller_unittest.cc

 // Copyright 2011 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/scheduler/frame_rate_controller.h"
 
+#include "base/test/test_simple_task_runner.h"
 #include "cc/test/scheduler_test_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class FakeFrameRateControllerClient : public cc::FrameRateControllerClient {
  public:
   FakeFrameRateControllerClient() { Reset(); }
 
   void Reset() { began_frame_ = false; }
   bool BeganFrame() const { return began_frame_; }
 
   virtual void FrameRateControllerTick(bool throttled) OVERRIDE {
     began_frame_ = !throttled;
   }
 
  protected:
   bool began_frame_;
 };
 
 TEST(FrameRateControllerTest, TestFrameThrottling_ImmediateAck) {
-  FakeThread thread;
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner =
+      new base::TestSimpleTaskRunner;
   FakeFrameRateControllerClient client;
   base::TimeDelta interval = base::TimeDelta::FromMicroseconds(
       base::Time::kMicrosecondsPerSecond / 60);
   scoped_refptr<FakeDelayBasedTimeSource> time_source =
-      FakeDelayBasedTimeSource::Create(interval, &thread);
+      FakeDelayBasedTimeSource::Create(interval, task_runner.get());
   FrameRateController controller(time_source);
 
   controller.SetClient(&client);
   controller.SetActive(true);
 
   base::TimeTicks elapsed;  // Muck around with time a bit
 
   // Trigger one frame, make sure the BeginFrame callback is called
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // Tell the controller we drew
   controller.DidSwapBuffers();
 
   // Tell the controller the frame ended 5ms later
   time_source->SetNow(time_source->Now() +
                       base::TimeDelta::FromMilliseconds(5));
   controller.DidSwapBuffersComplete();
 
   // Trigger another frame, make sure BeginFrame runs again
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   // Sanity check that previous code didn't move time backward.
   EXPECT_GE(elapsed, time_source->Now());
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
 }
 
 TEST(FrameRateControllerTest, TestFrameThrottling_TwoFramesInFlight) {
-  FakeThread thread;
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner =
+      new base::TestSimpleTaskRunner;
   FakeFrameRateControllerClient client;
   base::TimeDelta interval = base::TimeDelta::FromMicroseconds(
       base::Time::kMicrosecondsPerSecond / 60);
   scoped_refptr<FakeDelayBasedTimeSource> time_source =
-      FakeDelayBasedTimeSource::Create(interval, &thread);
+      FakeDelayBasedTimeSource::Create(interval, task_runner.get());
   FrameRateController controller(time_source);
 
   controller.SetClient(&client);
   controller.SetActive(true);
   controller.SetMaxSwapsPending(2);
 
   base::TimeTicks elapsed;  // Muck around with time a bit
 
   // Trigger one frame, make sure the BeginFrame callback is called
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // Tell the controller we drew
   controller.DidSwapBuffers();
 
   // Trigger another frame, make sure BeginFrame callback runs again
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   // Sanity check that previous code didn't move time backward.
   EXPECT_GE(elapsed, time_source->Now());
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // Tell the controller we drew, again.
   controller.DidSwapBuffers();
 
   // Trigger another frame. Since two frames are pending, we should not draw.
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   // Sanity check that previous code didn't move time backward.
   EXPECT_GE(elapsed, time_source->Now());
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_FALSE(client.BeganFrame());
 
   // Tell the controller the first frame ended 5ms later
   time_source->SetNow(time_source->Now() +
                       base::TimeDelta::FromMilliseconds(5));
   controller.DidSwapBuffersComplete();
 
   // Tick should not have been called
   EXPECT_FALSE(client.BeganFrame());
 
   // Trigger yet another frame. Since one frames is pending, another
   // BeginFrame callback should run.
-  elapsed += base::TimeDelta::FromMilliseconds(thread.PendingDelayMs());
+  elapsed += task_runner->NextPendingTaskDelay();
   // Sanity check that previous code didn't move time backward.
   EXPECT_GE(elapsed, time_source->Now());
   time_source->SetNow(elapsed);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
 }
 
 TEST(FrameRateControllerTest, TestFrameThrottling_Unthrottled) {
-  FakeThread thread;
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner =
+      new base::TestSimpleTaskRunner;
   FakeFrameRateControllerClient client;
-  FrameRateController controller(&thread);
+  FrameRateController controller(task_runner.get());
 
   controller.SetClient(&client);
   controller.SetMaxSwapsPending(2);
 
   // SetActive triggers 1st frame, make sure the BeginFrame callback
   // is called
   controller.SetActive(true);
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // Even if we don't call DidSwapBuffers, FrameRateController should
   // still attempt to tick multiple times until it does result in
   // a DidSwapBuffers.
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // DidSwapBuffers triggers 2nd frame, make sure the BeginFrame callback is
   // called
   controller.DidSwapBuffers();
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
   client.Reset();
 
   // DidSwapBuffers triggers 3rd frame (> max_frames_pending),
   // make sure the BeginFrame callback is NOT called
   controller.DidSwapBuffers();
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_FALSE(client.BeganFrame());
   client.Reset();
 
   // Make sure there is no pending task since we can't do anything until we
   // receive a DidSwapBuffersComplete anyway.
-  EXPECT_FALSE(thread.HasPendingTask());
+  EXPECT_FALSE(task_runner->HasPendingTask());
 
   // DidSwapBuffersComplete triggers a frame, make sure the BeginFrame
   // callback is called
   controller.DidSwapBuffersComplete();
-  thread.RunPendingTask();
+  task_runner->RunPendingTasks();
   EXPECT_TRUE(client.BeganFrame());
 }
 
 }  // namespace
 }  // namespace cc