Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/update_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_UPDATE_FETCHER_H_
-#define MOJO_SHELL_UPDATE_FETCHER_H_
+#ifndef MOJO_FETCHER_UPDATE_FETCHER_H_
+#define MOJO_FETCHER_UPDATE_FETCHER_H_
 
 #include "mojo/shell/fetcher.h"
 
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/services/updater/updater.mojom.h"
 #include "url/gurl.h"
 
 namespace mojo {
 
 class URLLoaderFactory;
 
-namespace shell {
+namespace fetcher {
 
-class UpdateFetcher : public Fetcher {
+class UpdateFetcher : public shell::Fetcher {
  public:
   UpdateFetcher(const GURL& url,
                 updater::Updater* updater,
                 const FetchCallback& loader_callback);
 
   ~UpdateFetcher() override;
 
  private:
   // Fetcher implementation:
   const GURL& GetURL() const override;
@@ skipping 10 matching lines @@
 
   void OnGetAppPath(const mojo::String& path);
 
   const GURL url_;
   base::FilePath path_;
   base::WeakPtrFactory<UpdateFetcher> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateFetcher);
 };
 
-}  // namespace shell
+}  // namespace fetcher
 }  // namespace mojo
 
-#endif  // MOJO_SHELL_UPDATE_FETCHER_H_
+#endif  // MOJO_FETCHER_UPDATE_FETCHER_H_