Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/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 MOJO_SHELL_LOCAL_FETCHER_H_
-#define MOJO_SHELL_LOCAL_FETCHER_H_
+#ifndef MOJO_FETCHER_LOCAL_FETCHER_H_
+#define MOJO_FETCHER_LOCAL_FETCHER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "mojo/shell/fetcher.h"
 #include "url/gurl.h"
 
 namespace mojo {
 
 class NetworkService;
 
-namespace shell {
+namespace fetcher {
 
 // Implements Fetcher for file:// URLs.
-class LocalFetcher : public Fetcher {
+class LocalFetcher : public shell::Fetcher {
  public:
   LocalFetcher(NetworkService* network_service,
                const GURL& url,
                const GURL& url_without_query,
                const FetchCallback& loader_callback);
 
   void GetMimeTypeFromFileCallback(const mojo::String& mime_type);
 
  private:
   const GURL& GetURL() const override;
@@ skipping 13 matching lines @@
 
   bool PeekFirstLine(std::string* line) override;
 
   GURL url_;
   base::FilePath path_;
   std::string mime_type_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalFetcher);
 };
 
-}  // namespace shell
-
+}  // namespace fetcher
 }  // namespace mojo
 
-#endif  // MOJO_SHELL_LOCAL_FETCHER_H_
+#endif  // MOJO_FETCHER_LOCAL_FETCHER_H_