Add GetOutputStreamParameters, GetAssociatedOutputDeviceID to AudioManager.

media/audio/win/core_audio_util_win_unittest.cc

Index: media/audio/win/core_audio_util_win_unittest.cc
diff --git a/media/audio/win/core_audio_util_win_unittest.cc b/media/audio/win/core_audio_util_win_unittest.cc
index 140e6496a186a00456f8a2715bee0e123484bdf2..abef86820203590075428b8716cfaaa8f6afaefb 100644
--- a/media/audio/win/core_audio_util_win_unittest.cc
+++ b/media/audio/win/core_audio_util_win_unittest.cc
@@ -511,4 +511,12 @@ TEST_F(CoreAudioUtilWinTest, GetMatchingOutputDeviceID) {
   EXPECT_TRUE(found_a_pair);
 }
 
+TEST_F(CoreAudioUtilWinTest, GetDefaultOutputDeviceID) {
+  if (!CanRunAudioTest())
+    return;
+
+  std::string default_device_id(CoreAudioUtil::GetDefaultOutputDeviceID());
+  EXPECT_FALSE(default_device_id.empty());
+}
+
 }  // namespace media