Put code in //services/js in namespace js

services/js/js_app_message_loop_observers.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/js/js_app_message_loop_observers.h"
 
-namespace mojo {
 namespace js {
 
 JSAppMessageLoopObservers::JSAppMessageLoopObservers(v8::Isolate* isolate)
   : isolate_(isolate),
     task_observer_(this),
     signal_observer_(this) {
   base::MessageLoop::current()->AddTaskObserver(&task_observer_);
-  common::MessagePumpMojo::current()->AddObserver(&signal_observer_);
+  mojo::common::MessagePumpMojo::current()->AddObserver(&signal_observer_);
 }
 
 JSAppMessageLoopObservers::~JSAppMessageLoopObservers() {
   base::MessageLoop::current()->RemoveTaskObserver(&task_observer_);
-  common::MessagePumpMojo::current()->RemoveObserver(&signal_observer_);
+  mojo::common::MessagePumpMojo::current()->RemoveObserver(&signal_observer_);
 }
 
 JSAppMessageLoopObservers::TaskObserver::TaskObserver(
     JSAppMessageLoopObservers* loop_observers)
     : loop_observers_(loop_observers) {
 }
 
 void JSAppMessageLoopObservers::TaskObserver::WillProcessTask(
     const base::PendingTask& pending_task) {
 }
@@ skipping 14 matching lines @@
 void JSAppMessageLoopObservers::SignalObserver::DidSignalHandler() {
   loop_observers_->RunMicrotasks();
 }
 
 void JSAppMessageLoopObservers::RunMicrotasks() {
   v8::Isolate::Scope scope(isolate_);
   isolate_->RunMicrotasks();
 }
 
 }  // namespace js
-}  // namespace mojo