Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/update_fetcher.cc

Index: mojo/fetcher/update_fetcher.cc
diff --git a/mojo/shell/update_fetcher.cc b/mojo/fetcher/update_fetcher.cc
similarity index 97%
rename from mojo/shell/update_fetcher.cc
rename to mojo/fetcher/update_fetcher.cc
index 5e1d434f261885b53418db926dddbe37d0315bd5..d48252fce49d18175816a74ea93330e80b9b0b36 100644
--- a/mojo/shell/update_fetcher.cc
+++ b/mojo/fetcher/update_fetcher.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "mojo/shell/update_fetcher.h"
+#include "mojo/fetcher/update_fetcher.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ -14,10 +14,9 @@
 #include "mojo/common/url_type_converters.h"
 
 namespace mojo {
-namespace shell {
+namespace fetcher {
 
 namespace {
-
 void IgnoreResult(bool result) {
 }
 
@@ -97,5 +96,5 @@ void UpdateFetcher::OnGetAppPath(const mojo::String& path) {
   loader_callback_.Run(make_scoped_ptr(this));
 }
 
-}  // namespace shell
+}  // namespace fetcher
 }  // namespace mojo