Move WebUIMessageHandler to its own file in the public directory and put it in the content namesp...

chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/webui/chromeos/login/update_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
+#include "content/browser/webui/web_ui.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // Update screen ID.
 const char kUpdateScreen[] = "update";
 
 }  // namespace
@@ skipping 94 matching lines @@
 }
 
 #if !defined(OFFICIAL_BUILD)
 void UpdateScreenHandler::HandleUpdateCancel(const base::ListValue* args) {
   DCHECK(args && args->empty());
   screen_->CancelUpdate();
 }
 #endif
 
 }  // namespace chromeos