Move fetchers into mojo/shell/fetcher

mojo/shell/fetcher/data_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 MOJO_FETCHER_DATA_FETCHER_H_
-#define MOJO_FETCHER_DATA_FETCHER_H_
+#ifndef MOJO_SHELL_FETCHER_DATA_FETCHER_H_
+#define MOJO_SHELL_FETCHER_DATA_FETCHER_H_
 
 #include "mojo/shell/fetcher.h"
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "mojo/services/network/public/interfaces/url_loader.mojom.h"
 #include "url/gurl.h"
 
 namespace mojo {
-namespace fetcher {
+namespace shell {
 
 // Implements Fetcher for data: URLs.
-class DataFetcher : public shell::Fetcher {
+class DataFetcher : public Fetcher {
  public:
   static void Start(const GURL& url, const FetchCallback& loader_callback);
 
  private:
   DataFetcher(const GURL& url, const FetchCallback& loader_callback);
   ~DataFetcher() override;
 
   void BuildAndDispatchResponse();
 
-  // shell::Fetcher implementation.
+  // Fetcher implementation.
   const GURL& GetURL() const override;
   GURL GetRedirectURL() const override;
   GURL GetRedirectReferer() const override;
   URLResponsePtr AsURLResponse(base::TaskRunner* task_runner,
                                uint32_t skip) override;
   void AsPath(
       base::TaskRunner* task_runner,
       base::Callback<void(const base::FilePath&, bool)> callback) override;
   std::string MimeType() override;
   bool HasMojoMagic() override;
   bool PeekFirstLine(std::string* line) override;
 
   const GURL url_;
   URLResponsePtr response_;
 
   DISALLOW_COPY_AND_ASSIGN(DataFetcher);
 };
 
-}  // namespace fetcher
+}  // namespace shell
 }  // namespace mojo
 
-#endif  // MOJO_FETCHER_DATA_FETCHER_H_
+#endif  // MOJO_SHELL_FETCHER_DATA_FETCHER_H_