Add recording capability to AudioManager, and implemented on windows using the WaveIn APIs.

media/audio/mac/audio_manager_mac.cc

Index: media/audio/mac/audio_manager_mac.cc
diff --git a/media/audio/mac/audio_manager_mac.cc b/media/audio/mac/audio_manager_mac.cc
index 2cc5b391ef8845888a821a5258c8dd640f881893..84f76de56d4d304892eb128669540957b299c4ef 100644
--- a/media/audio/mac/audio_manager_mac.cc
+++ b/media/audio/mac/audio_manager_mac.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -27,6 +27,21 @@ bool AudioManagerMac::HasAudioOutputDevices() {
          output_device_id != kAudioObjectUnknown;
 }
 
+bool AudioManagerMac::HasAudioInputDevices() {
+  // TODO(satish): implement.
+  return false;
+}
+
+AudioInputStream* AudioManagerMac::MakeAudioInputStream(
+    Format format,
+    int channels,
+    int sample_rate,
+    char bits_per_sample,
+    uint32 samples_per_packet) {
+  // TODO(satish): implement.
+  return NULL;
+}
+
 AudioOutputStream* AudioManagerMac::MakeAudioOutputStream(
     Format format,
     int channels,