Implement MediaCaptureDevices.

content/browser/renderer_host/media/media_stream_manager.cc

Index: content/browser/renderer_host/media/media_stream_manager.cc
diff --git a/content/browser/renderer_host/media/media_stream_manager.cc b/content/browser/renderer_host/media/media_stream_manager.cc
index fdb3b2c8c5e03c8b69578e4b5f072389d17ecc91..d083c26381a62fa8828b22eca26bb977472437de 100644
--- a/content/browser/renderer_host/media/media_stream_manager.cc
+++ b/content/browser/renderer_host/media/media_stream_manager.cc
@@ -18,6 +18,7 @@
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/browser/renderer_host/media/device_request_message_filter.h"
+#include "content/browser/renderer_host/media/media_capture_devices_impl.h"
 #include "content/browser/renderer_host/media/media_stream_requester.h"
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
 #include "content/browser/renderer_host/media/video_capture_manager.h"
@@ -1752,9 +1753,13 @@ void MediaStreamManager::NotifyDevicesChanged(
   }
 
   if (IsAudioMediaType(stream_type)) {
-    media_observer->OnAudioCaptureDevicesChanged(new_devices);
+    MediaCaptureDevicesImpl::GetInstance()->OnAudioCaptureDevicesChanged(
+        new_devices);
+    media_observer->OnAudioCaptureDevicesChanged();
   } else if (IsVideoMediaType(stream_type)) {
-    media_observer->OnVideoCaptureDevicesChanged(new_devices);
+    MediaCaptureDevicesImpl::GetInstance()->OnVideoCaptureDevicesChanged(
+        new_devices);
+    media_observer->OnVideoCaptureDevicesChanged();
   } else {
     NOTREACHED();
   }