Added volume adjust sound behind the flag.

media/audio/sounds/audio_stream_handler_unittest.cc

Index: media/audio/sounds/audio_stream_handler_unittest.cc
diff --git a/media/audio/sounds/audio_stream_handler_unittest.cc b/media/audio/sounds/audio_stream_handler_unittest.cc
index 50bc301c38abed23f5a72eadcd39e2764a4802c4..d6f2c2a325ba86b363b744573d24a2e599cfb561 100644
--- a/media/audio/sounds/audio_stream_handler_unittest.cc
+++ b/media/audio/sounds/audio_stream_handler_unittest.cc
@@ -49,6 +49,10 @@ class AudioStreamHandlerTest : public testing::Test {
     AudioStreamHandler::SetAudioSourceForTesting(source);
   }
 
+  void AllowReplayOnceForTesting() {
+    audio_stream_handler_->AllowReplayOnceForTesting();
+  }
+
  private:
   scoped_ptr<AudioManager> audio_manager_;
   scoped_ptr<AudioStreamHandler> audio_stream_handler_;
@@ -74,34 +78,24 @@ TEST_F(AudioStreamHandlerTest, Play) {
   ASSERT_EQ(4, observer.cursor());
 }
 
-TEST_F(AudioStreamHandlerTest, Rewind) {
+TEST_F(AudioStreamHandlerTest, Replay) {
   base::RunLoop run_loop;
   TestObserver observer(run_loop.QuitClosure());
-  SineWaveAudioSource source(CHANNEL_LAYOUT_STEREO, 200.0, 8000);
-
   SetObserverForTesting(&observer);
-  SetAudioSourceForTesting(&source);
 
   ASSERT_TRUE(audio_stream_handler()->IsInitialized());
 
+  AllowReplayOnceForTesting();
+  ASSERT_TRUE(audio_stream_handler()->Play());
   ASSERT_TRUE(audio_stream_handler()->Play());
-  base::MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      base::Bind(base::IgnoreResult(&AudioStreamHandler::Play),
-                 base::Unretained(audio_stream_handler())),
-      base::TimeDelta::FromSeconds(3));
-  base::MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      base::Bind(&AudioStreamHandler::Stop,
-                 base::Unretained(audio_stream_handler())),
-      base::TimeDelta::FromSeconds(6));
 
   run_loop.Run();
 
   SetObserverForTesting(NULL);
   SetAudioSourceForTesting(NULL);
 
-  ASSERT_EQ(2, observer.num_play_requests());
+  ASSERT_EQ(1, observer.num_play_requests());
+  ASSERT_EQ(1, observer.num_replays());
   ASSERT_EQ(1, observer.num_stop_requests());
 }