Corresponding change in Pepper since EnumerateDevices contract is changed.

content/renderer/pepper/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper/pepper_plugin_delegate_impl.cc
===================================================================
--- content/renderer/pepper/pepper_plugin_delegate_impl.cc	(revision 148913)
+++ content/renderer/pepper/pepper_plugin_delegate_impl.cc	(working copy)
@@ -1495,6 +1495,24 @@
   return request_id;
 }
 
+int PepperPluginDelegateImpl::StopEnumerateDevices(int request_id) {
+  device_enumeration_event_handler_->UnregisterEnumerateDevicesCallback(
+      request_id);
+
+#if defined(ENABLE_WEBRTC)
+  render_view_->media_stream_dispatcher()->StopEnumerateDevices(
+      request_id, device_enumeration_event_handler_.get()->AsWeakPtr());
+#else
+  MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(
+          &PepperDeviceEnumerationEventHandler::OnDevicesEnumerationFailed,
+          device_enumeration_event_handler_->AsWeakPtr(), request_id));
+#endif
+
+  return request_id;
+}
+
 bool PepperPluginDelegateImpl::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PepperPluginDelegateImpl, message)