Move apps/shell to extensions/shell.

apps/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"
-
-#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;
-  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);
-}