On windows, create PCMWaveInAudioInputStream instance with correct device ID.

media/audio/win/audio_manager_win.h

Index: media/audio/win/audio_manager_win.h
diff --git a/media/audio/win/audio_manager_win.h b/media/audio/win/audio_manager_win.h
index 594e5351092b4c2b82c0e1c174da5b6497a6f5eb..ba944f024d52f4c91920648e2929a298a3f207e8 100644
--- a/media/audio/win/audio_manager_win.h
+++ b/media/audio/win/audio_manager_win.h
@@ -1,4 +1,4 @@
-// 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.
 
@@ -62,6 +62,15 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
     enumeration_type_ = type;
   }
 
+  // Returns a PCMWaveInAudioInputStream instance or NULL on failure.
+  // This method converts MMDevice-style device ID to WaveIn-style device ID if
+  // necessary.
+  // (Please see device_enumeration_win.h for more info about the two kinds of
+  // device IDs.)
+  AudioInputStream* CreatePCMWaveInAudioInputStream(
+      const AudioParameters& params,
+      const std::string& device_id);
+
   // Number of currently open output streams.
   int num_output_streams_;