Move application_manager from /mojo to /shell.

shell/application_manager/application_loader.cc

 // Copyright 2014 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.
 
-#include "mojo/application_manager/application_loader.h"
+#include "shell/application_manager/application_loader.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 
 namespace mojo {
 
 namespace {
 
 void NotReached(const GURL& url,
                 ScopedMessagePipeHandle shell_handle,
                 URLResponsePtr response) {
   NOTREACHED();
 }
 
 }  // namespace
 
 ApplicationLoader::LoadCallback ApplicationLoader::SimpleLoadCallback() {
   return base::Bind(&NotReached);
 }
 
 }  // namespace mojo