Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/network_fetcher.h

Index: mojo/fetcher/network_fetcher.h
diff --git a/mojo/shell/network_fetcher.h b/mojo/fetcher/network_fetcher.h
similarity index 91%
rename from mojo/shell/network_fetcher.h
rename to mojo/fetcher/network_fetcher.h
index 5b9ab650e7cb8cfcfda8e70919fca9d96ad4def4..d7edcf833f511912d1e93fdd14dba696b8f7cc0b 100644
--- a/mojo/shell/network_fetcher.h
+++ b/mojo/fetcher/network_fetcher.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_SHELL_NETWORK_FETCHER_H_
-#define MOJO_SHELL_NETWORK_FETCHER_H_
+#ifndef MOJO_FETCHER_NETWORK_FETCHER_H_
+#define MOJO_FETCHER_NETWORK_FETCHER_H_
 
 #include "mojo/shell/fetcher.h"
 
@@ -16,10 +16,10 @@ namespace mojo {
 
 class URLLoaderFactory;
 
-namespace shell {
+namespace fetcher {
 
 // Implements Fetcher for http[s] files.
-class NetworkFetcher : public Fetcher {
+class NetworkFetcher : public shell::Fetcher {
  public:
   NetworkFetcher(bool disable_cache,
                  mojo::URLRequestPtr request,
@@ -79,7 +79,7 @@ class NetworkFetcher : public Fetcher {
   DISALLOW_COPY_AND_ASSIGN(NetworkFetcher);
 };
 
-}  // namespace shell
+}  // namespace fetcher
 }  // namespace mojo
 
-#endif  // MOJO_SHELL_NETWORK_FETCHER_H_
+#endif  // MOJO_FETCHER_NETWORK_FETCHER_H_