Add support for device-change notifications to MediaStreamDispatcher and MediaStreamDispatcherHost

content/renderer/pepper/pepper_media_device_manager.h

Index: content/renderer/pepper/pepper_media_device_manager.h
diff --git a/content/renderer/pepper/pepper_media_device_manager.h b/content/renderer/pepper/pepper_media_device_manager.h
index c2ee4b9dd4f25f6945b0d58fbfb6f518f668c1ae..90d6dc09dcf50c2c47945016a2b2f3adfead4098 100644
--- a/content/renderer/pepper/pepper_media_device_manager.h
+++ b/content/renderer/pepper/pepper_media_device_manager.h
@@ -72,6 +72,7 @@ class PepperMediaDeviceManager
                       const std::string& label,
                       const StreamDeviceInfo& device_info) override;
   void OnDeviceOpenFailed(int request_id) override;
+  void OnDevicesChanged() override;
 
   // Stream type conversion.
   static MediaStreamType FromPepperDeviceType(PP_DeviceType_Dev type);