Fix problem when we did not play beginning of HTML5 audio stream in low latency mode.

media/audio/audio_output_controller_unittest.cc

Index: media/audio/audio_output_controller_unittest.cc
===================================================================
--- media/audio/audio_output_controller_unittest.cc	(revision 104976)
+++ media/audio/audio_output_controller_unittest.cc	(working copy)
@@ -14,6 +14,7 @@
 
 using ::testing::_;
 using ::testing::AtLeast;
+using ::testing::DoAll;
 using ::testing::Exactly;
 using ::testing::InvokeWithoutArgs;
 using ::testing::NotNull;
@@ -54,6 +55,7 @@
   MOCK_METHOD1(UpdatePendingBytes, void(uint32 bytes));
   MOCK_METHOD2(Read, uint32(void* data, uint32 size));
   MOCK_METHOD0(Close, void());
+  MOCK_METHOD0(DataReady, bool());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockAudioOutputControllerSyncReader);
@@ -150,6 +152,58 @@
   CloseAudioController(controller);
 }
 
+TEST(AudioOutputControllerTest, PlayAndCloseLowLatency) {
+  if (!HasAudioOutputDevices() || IsRunningHeadless())
+    return;
+
+  MockAudioOutputControllerEventHandler event_handler;
+  base::WaitableEvent event(false, false);
+
+  // If OnCreated is called then signal the event.
+  EXPECT_CALL(event_handler, OnCreated(NotNull()))
+      .WillOnce(SignalEvent(&event));
+
+  // OnPlaying() will be called only once.
+  EXPECT_CALL(event_handler, OnPlaying(NotNull()))
+      .Times(Exactly(1));
+
+  MockAudioOutputControllerSyncReader sync_reader;
+  EXPECT_CALL(sync_reader, UpdatePendingBytes(_))
+      .Times(AtLeast(10));
+  EXPECT_CALL(sync_reader, DataReady())
+      .WillOnce(Return(false))
+      .WillOnce(Return(false))
+      .WillRepeatedly(Return(true));
+  EXPECT_CALL(sync_reader, Read(_, kHardwareBufferSize))
+      .Times(AtLeast(10))
+      .WillRepeatedly(DoAll(SignalEvent(&event),
+                            Return(1)));
+  EXPECT_CALL(sync_reader, Close());
+
+  AudioParameters params(AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout,
+                         kSampleRate, kBitsPerSample, kSamplesPerPacket);
+  scoped_refptr<AudioOutputController> controller =
+      AudioOutputController::CreateLowLatency(&event_handler,
+                                              params,
+                                              &sync_reader);
+  ASSERT_TRUE(controller.get());
+
+  // Wait for OnCreated() to be called.
+  event.Wait();
+
+  controller->Play();
+
+  // Wait until the date is requested at least 10 times.
+  for (int i = 0; i < 10; i++) {
+    event.Wait();
+    uint8 buf[1];
+    controller->EnqueueData(buf, 0);
+  }
+
+  // Now stop the controller.
+  CloseAudioController(controller);
+}
+
 TEST(AudioOutputControllerTest, PlayPauseClose) {
   if (!HasAudioOutputDevices() || IsRunningHeadless())
     return;