Add support for device-change notifications to MediaStreamDispatcher and MediaStreamDispatcherHost

content/renderer/pepper/pepper_media_device_manager.cc

Index: content/renderer/pepper/pepper_media_device_manager.cc
diff --git a/content/renderer/pepper/pepper_media_device_manager.cc b/content/renderer/pepper/pepper_media_device_manager.cc
index e4dd1f6a4da1471d128939fccfc54a5e0ee19091..c07780ec631acba987948a2c291033fd7967c1f8 100644
--- a/content/renderer/pepper/pepper_media_device_manager.cc
+++ b/content/renderer/pepper/pepper_media_device_manager.cc
@@ -200,6 +200,8 @@ void PepperMediaDeviceManager::OnDeviceOpenFailed(int request_id) {
   NotifyDeviceOpened(request_id, false, std::string());
 }
 
+void PepperMediaDeviceManager::OnDevicesChanged() {}
+
 // static
 MediaStreamType PepperMediaDeviceManager::FromPepperDeviceType(
     PP_DeviceType_Dev type) {