On windows, create PCMWaveInAudioInputStream instance with correct device ID.

media/audio/win/device_enumeration_win.h

Index: media/audio/win/device_enumeration_win.h
diff --git a/media/audio/win/device_enumeration_win.h b/media/audio/win/device_enumeration_win.h
index a797eec4521eae58aa0fab6f4ab64a3ec9654016..3d44670a6d334deff5374ec9445e579fdfe2c4dd 100644
--- a/media/audio/win/device_enumeration_win.h
+++ b/media/audio/win/device_enumeration_win.h
@@ -1,12 +1,16 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #ifndef MEDIA_AUDIO_WIN_DEVICE_ENUMERATION_WIN_H_
 #define MEDIA_AUDIO_WIN_DEVICE_ENUMERATION_WIN_H_
 
+#include <string>
+
 #include "media/audio/audio_device_name.h"
 
+namespace media {
+
 // Returns a list of audio input device structures (name and unique device ID)
 // using the MMDevice API which is supported on Windows Vista and higher.
 // Example record in the output list:
@@ -22,5 +26,15 @@ bool GetInputDeviceNamesWin(media::AudioDeviceNames* device_names);
 // - unique_id: "Microphone (Realtek High Defini" (same as friendly name).
 bool GetInputDeviceNamesWinXP(media::AudioDeviceNames* device_names);
 
+// Converts a device ID generated by |GetInputDeviceNamesWin()| to the
+// corresponding ID by |GetInputDeviceNamesWinXP()|. Returns an empty string on
+// failure.
+// Example input and output:
+// - input ID: "{0.0.1.00000000}.{8db6020f-18e3-4f25-b6f5-7726c9122574}"
+// - output ID: "Microphone (Realtek High Defini"
+std::string ConvertToWinXPDeviceId(const std::string& device_id);
+
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_WIN_DEVICE_ENUMERATION_WIN_H_