Move apps/shell to extensions/shell.

extensions/shell/app/shell_main.cc

 // Copyright (c) 2013 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 "apps/shell/app/shell_main_delegate.h"
 #include "content/public/app/content_main.h"
+#include "extensions/shell/app/shell_main_delegate.h"
 
 #if defined(OS_WIN)
 #include "content/public/app/startup_helper_win.h"
 #include "sandbox/win/src/sandbox_types.h"
 #endif
 
 #if defined(OS_WIN)
 int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
 #else
 int main(int argc, const char** argv) {
 #endif
-  apps::ShellMainDelegate delegate;
+  extensions::ShellMainDelegate delegate;
   content::ContentMainParams params(&delegate);
 
 #if defined(OS_WIN)
   sandbox::SandboxInterfaceInfo sandbox_info = {0};
   content::InitializeSandboxInfo(&sandbox_info);
   params.instance = instance;
   params.sandbox_info = &sandbox_info;
 #else
   params.argc = argc;
   params.argv = argv;
 #endif
 
   return content::ContentMain(params);
 }