Use the mojo::shell namespace consistently underly shell/.

shell/shell_test_helper.h

 // 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.
 
 #ifndef SHELL_SHELL_TEST_HELPER_H_
 #define SHELL_SHELL_TEST_HELPER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "shell/application_manager/application_loader.h"
 #include "shell/context.h"
 
 class GURL;
 
 namespace mojo {
-
 namespace shell {
 
 // ShellTestHelper is useful for tests to establish a connection to the
 // ApplicationManager. Invoke Init() to establish the connection. Once done,
 // application_manager() returns the ApplicationManager.
 class ShellTestHelper {
  public:
   ShellTestHelper();
   ~ShellTestHelper();
 
@@ skipping 16 matching lines @@
   Context context_;
   base::MessageLoop shell_loop_;
   scoped_ptr<ApplicationManager::TestAPI> test_api_;
   DISALLOW_COPY_AND_ASSIGN(ShellTestHelper);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // SHELL_SHELL_TEST_HELPER_H_