Change base::TickClock to a ref counted class.

content/browser/media/audio_stream_monitor_unittest.cc

 // Copyright 2014 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 "content/browser/media/audio_stream_monitor.h"
 
 #include <map>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 23 matching lines @@
 class MockWebContentsDelegate : public WebContentsDelegate {
  public:
   MOCK_METHOD2(NavigationStateChanged,
                void(const WebContents* source, InvalidateTypes changed_flags));
 };
 
 }  // namespace
 
 class AudioStreamMonitorTest : public RenderViewHostTestHarness {
  public:
-  AudioStreamMonitorTest() {
+  AudioStreamMonitorTest()
+      : monitor_(NULL), clock_(new base::SimpleTestTickClock()) {
     // Start |clock_| at non-zero.
-    clock_.Advance(base::TimeDelta::FromSeconds(1000000));
+    clock_->Advance(base::TimeDelta::FromSeconds(1000000));
   }
 
   virtual void SetUp() override {
     RenderViewHostTestHarness::SetUp();
 
     WebContentsImpl* web_contents = reinterpret_cast<WebContentsImpl*>(
         RenderViewHostTestHarness::web_contents());
     web_contents->SetDelegate(&mock_web_contents_delegate_);
     monitor_ = web_contents->audio_stream_monitor();
-    const_cast<base::TickClock*&>(monitor_->clock_) = &clock_;
+    monitor_->set_clock_for_testing(clock_);
   }
 
-  base::TimeTicks GetTestClockTime() { return clock_.NowTicks(); }
+  base::TimeTicks GetTestClockTime() { return clock_->NowTicks(); }
 
-  void AdvanceClock(const base::TimeDelta& delta) { clock_.Advance(delta); }
+  void AdvanceClock(const base::TimeDelta& delta) { clock_->Advance(delta); }
 
   AudioStreamMonitor::ReadPowerAndClipCallback CreatePollCallback(
       int stream_id) {
     return base::Bind(
         &AudioStreamMonitorTest::ReadPower, base::Unretained(this), stream_id);
   }
 
   void SetStreamPower(int stream_id, float power) {
     current_power_[stream_id] = power;
   }
@@ skipping 64 matching lines @@
 
   void ExpectIsNotifyingForToggleOn() {
     EXPECT_TRUE(monitor_->WasRecentlyAudible());
   }
 
   void ExpectIsNotifyingForToggleOff() {
     EXPECT_FALSE(monitor_->WasRecentlyAudible());
   }
 
   MockWebContentsDelegate mock_web_contents_delegate_;
-  base::SimpleTestTickClock clock_;
+  scoped_refptr<base::SimpleTestTickClock> clock_;
   std::map<int, float> current_power_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioStreamMonitorTest);
 };
 
 // Tests that AudioStreamMonitor is polling while it has a
 // ReadPowerAndClipCallback, and is not polling at other times.
 TEST_F(AudioStreamMonitorTest, PollsWhenProvidedACallback) {
   EXPECT_FALSE(monitor_->WasRecentlyAudible());
   ExpectIsPolling(kRenderProcessId, kStreamId, false);
@@ skipping 131 matching lines @@
   StartMonitoring(
       kAnotherRenderProcessId, kStreamId, CreatePollCallback(kStreamId));
   ExpectIsPolling(kRenderProcessId, kStreamId, true);
   ExpectIsPolling(kAnotherRenderProcessId, kStreamId, true);
   StopMonitoring(kAnotherRenderProcessId, kStreamId);
   ExpectIsPolling(kRenderProcessId, kStreamId, true);
   ExpectIsPolling(kAnotherRenderProcessId, kStreamId, false);
 }
 
 }  // namespace content