Remove chrome://welcome page.

chrome/browser/ui/webui/welcome_handler_android.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_WELCOME_HANDLER_ANDROID_H_
-#define CHROME_BROWSER_UI_WEBUI_WELCOME_HANDLER_ANDROID_H_
-
-#include "base/scoped_observer.h"
-#include "chrome/browser/sync/profile_sync_service.h"
-#include "chrome/browser/sync/profile_sync_service_observer.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-namespace base {
-class ListValue;
-}
-
-// Handler class for chrome://welcome page.
-class WelcomeHandler : public content::WebUIMessageHandler,
-                       public ProfileSyncServiceObserver {
- public:
-  WelcomeHandler();
-  virtual ~WelcomeHandler();
-
-  // content::WebUIMessageHandler implementation.
-  virtual void RegisterMessages() OVERRIDE;
-
-  // Callback for the "updateSyncFooterVisibility" message. This makes the sync
-  // footer in the page visible if sync is enabled.
-  void HandleUpdateSyncFooterVisibility(const base::ListValue* args);
-
-  // Callback for the "showSyncSettings" message. This opens the sync settings
-  // menu fragment.
-  void HandleShowSyncSettings(const base::ListValue* args);
-
-  // Callback for the "showTermsOfService" message. This opens the terms of
-  // service popup.
-  void HandleShowTermsOfService(const base::ListValue* args);
-
-  // ProfileSyncServiceObserver implementation
-  virtual void OnStateChanged() OVERRIDE;
-
- private:
-  // Update the sync footer visibility. Set |forced| if you want to force to
-  // send an update to the renderer regardless of whether we assume the state
-  // is up to date or not.
-  void UpdateSyncFooterVisibility(bool forced);
-
-  // Cached pointer to the sync service for this profile.
-  ProfileSyncService* sync_service_;
-
-  ScopedObserver<ProfileSyncService, WelcomeHandler> observer_manager_;
-
-  // Whether the sync footer is visible on the page.
-  bool is_sync_footer_visible_;
-
-  DISALLOW_COPY_AND_ASSIGN(WelcomeHandler);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_WELCOME_HANDLER_ANDROID_H_