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

shell/application_manager/local_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_LOCAL_FETCHER_H_
 #define SHELL_APPLICATION_MANAGER_LOCAL_FETCHER_H_
 
 #include "base/files/file_path.h"
 #include "mojo/services/network/public/interfaces/url_loader.mojom.h"
 #include "shell/application_manager/fetcher.h"
 #include "url/gurl.h"
 
 namespace mojo {
+namespace shell {
 
 // Implements Fetcher for file:// URLs.
 class LocalFetcher : public Fetcher {
  public:
   LocalFetcher(const GURL& url,
                const GURL& url_without_query,
                const FetchCallback& loader_callback);
 
  private:
   static base::FilePath UrlToFile(const GURL& url);
@@ skipping 13 matching lines @@
   bool HasMojoMagic() override;
 
   bool PeekFirstLine(std::string* line) override;
 
   GURL url_;
   base::FilePath path_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalFetcher);
 };
 
+}  // namespace shell
+}  // namespace mojo
+
 #endif  // SHELL_APPLICATION_MANAGER_LOCAL_FETCHER_H_
-
-}  // namespace mojo