cc: Cleanup DelayBasedTimeSource code.

cc/scheduler/begin_frame_source_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 <deque>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 512 matching lines @@
   void TearDown() override { obs_.reset(); }
 };
 
 TEST_F(SyntheticBeginFrameSourceTest,
        SetNeedsBeginFramesCallsOnBeginFrameWithMissedTick) {
   now_src_->Advance(base::TimeDelta::FromMicroseconds(9010));
   EXPECT_CALL((*obs_), OnBeginFrame(CreateBeginFrameArgsForTesting(
                            BEGINFRAME_FROM_HERE, 10000, 20000, 10000,
                            BeginFrameArgs::MISSED)));
   source_->SetNeedsBeginFrames(true);  // Should cause the last tick to be sent
-  // No tasks should need to be run for this to occur.
+  task_runner_->RunPendingTasks();
 }
 
 TEST_F(SyntheticBeginFrameSourceTest,
        SetNeedsBeginFramesCallsCausesOnBeginFrame) {
   source_->SetNeedsBeginFrames(true);
   EXPECT_EQ(10000, task_runner_->NextTaskTime().ToInternalValue());
 
   EXPECT_BEGIN_FRAME_USED(*obs_, 10000, 20000, 10000);
   now_src_->Advance(base::TimeDelta::FromMicroseconds(9010));
   task_runner_->RunPendingTasks();
@@ skipping 226 matching lines @@
   mux_->SetActiveSource(source2_);
   SEND_BEGIN_FRAME_DROP(*source2_, 750, 1050, 300);
   SEND_BEGIN_FRAME_USED(*source2_, 1050, 1250, 300);
 
   mux_->SetActiveSource(source1_);
   SEND_BEGIN_FRAME_DROP(*source2_, 1100, 1400, 300);
 }
 
 }  // namespace
 }  // namespace cc