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

shell/application_manager/fetcher.h

 // Copyright 2015 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_APPLICATION_MANAGER_FETCHER_H_
 #define SHELL_APPLICATION_MANAGER_FETCHER_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 
 #include "mojo/services/network/public/interfaces/url_loader.mojom.h"
 
 class GURL;
 
 namespace base {
-
 class FilePath;
 class TaskRunner;
 }
 
 namespace mojo {
+namespace shell {
 
 // Fetcher abstracts getting an application by either file or http[s] URL.
 //
 // Although it is possible to use the Network implementation for http[s] URLs
 // (because the underlying net library knows how to handle them), it is
 // extremely slow because network responses must be copied to disk in order to
 // get a file handle we can use with dlopen.
 //
 // Until this is solved, we use two different implementations so that
 // performance isn't completely absymal.
@@ skipping 31 matching lines @@
   bool PeekContentHandler(std::string* mojo_shebang,
                           GURL* mojo_content_handler_url);
 
  protected:
   static const char kMojoMagic[];
   static const size_t kMaxShebangLength;
 
   FetchCallback loader_callback_;
 };
 
+}  // namespace shell
 }  // namespace mojo
 
 #endif  // SHELL_APPLICATION_MANAGER_FETCHER_H_