Ensures that WebRTC works for device selection using a different sample rate than default

content/browser/renderer_host/media/audio_input_device_manager.cc

Index: content/browser/renderer_host/media/audio_input_device_manager.cc
diff --git a/content/browser/renderer_host/media/audio_input_device_manager.cc b/content/browser/renderer_host/media/audio_input_device_manager.cc
index b4579f88571f4a2ba666c1c1d2587e2b9d0cd778..14bd4706fc38d73025068bc3162226fe0e5967d1 100644
--- a/content/browser/renderer_host/media/audio_input_device_manager.cc
+++ b/content/browser/renderer_host/media/audio_input_device_manager.cc
@@ -12,6 +12,8 @@
 #include "media/audio/audio_device_name.h"
 #include "media/audio/audio_input_ipc.h"
 #include "media/audio/audio_manager_base.h"
+#include "media/audio/audio_util.h"
+#include "media/base/channel_layout.h"
 
 namespace content {
 
@@ -154,8 +156,17 @@ void AudioInputDeviceManager::EnumerateOnDeviceThread(
   scoped_ptr<StreamDeviceInfoArray> devices(new StreamDeviceInfoArray());
   for (media::AudioDeviceNames::iterator it = device_names.begin();
        it != device_names.end(); ++it) {
+    // Get the preferred sample rate and channel configuration for the
+    // current audio device.
+    int sample_rate =
+        media::GetAudioInputHardwareSampleRate(it->unique_id);
+    media::ChannelLayout channel_layout =
+        media::GetAudioInputHardwareChannelLayout(it->unique_id);
+
+    // Add device information to device vector.
     devices->push_back(StreamDeviceInfo(
-        stream_type, it->device_name, it->unique_id, false));
+        stream_type, it->device_name, it->unique_id, sample_rate,
+        channel_layout, false));
   }
 
   // Return the device list through the listener by posting a task on