Add GetOutputStreamParameters, GetAssociatedOutputDeviceID to AudioManager.

media/audio/win/core_audio_util_win_unittest.cc

 // Copyright (c) 2012 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 "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/win/scoped_co_mem.h"
 #include "base/win/scoped_com_initializer.h"
 #include "base/win/scoped_handle.h"
@@ skipping 493 matching lines @@
     base::win::ScopedCoMem<WCHAR> wide_id;
     device->GetId(&wide_id);
     std::string id;
     WideToUTF8(wide_id, wcslen(wide_id), &id);
     found_a_pair = !CoreAudioUtil::GetMatchingOutputDeviceID(id).empty();
   }
 
   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