Remove chrome://welcome page.

chrome/browser/ui/webui/welcome_handler_android.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 "chrome/browser/ui/webui/welcome_handler_android.h"
-
-#include "base/bind.h"
-#include "base/values.h"
-#include "chrome/browser/android/chromium_application.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/sync/profile_sync_service_factory.h"
-#include "content/public/browser/web_ui.h"
-
-WelcomeHandler::WelcomeHandler()
-    : sync_service_(NULL),
-      observer_manager_(this),
-      is_sync_footer_visible_(false) {}
-
-WelcomeHandler::~WelcomeHandler() {}
-
-void WelcomeHandler::RegisterMessages() {
-  web_ui()->RegisterMessageCallback(
-      "updateSyncFooterVisibility",
-      base::Bind(&WelcomeHandler::HandleUpdateSyncFooterVisibility,
-      base::Unretained(this)));
-
-  web_ui()->RegisterMessageCallback(
-      "showSyncSettings",
-      base::Bind(&WelcomeHandler::HandleShowSyncSettings,
-      base::Unretained(this)));
-
-  web_ui()->RegisterMessageCallback(
-      "showTermsOfService",
-      base::Bind(&WelcomeHandler::HandleShowTermsOfService,
-      base::Unretained(this)));
-
-  // Register for callbacks
-  sync_service_ = ProfileSyncServiceFactory::GetInstance()->GetForProfile(
-      Profile::FromWebUI(web_ui()));
-  if (sync_service_)
-    observer_manager_.Add(sync_service_);
-}
-
-void WelcomeHandler::HandleUpdateSyncFooterVisibility(
-    const base::ListValue* args) {
-  UpdateSyncFooterVisibility(true);
-}
-
-void WelcomeHandler::HandleShowSyncSettings(const base::ListValue* args) {
-  chrome::android::ChromiumApplication::ShowSyncSettings();
-}
-
-void WelcomeHandler::HandleShowTermsOfService(const base::ListValue* args) {
-  chrome::android::ChromiumApplication::ShowTermsOfServiceDialog();
-}
-
-void WelcomeHandler::OnStateChanged() {
-  UpdateSyncFooterVisibility(false);
-}
-
-void WelcomeHandler::UpdateSyncFooterVisibility(bool forced) {
-  bool is_sync_enabled =
-      sync_service_ && sync_service_->IsSyncEnabledAndLoggedIn();
-
-  if (forced || is_sync_footer_visible_ != is_sync_enabled) {
-    is_sync_footer_visible_ = is_sync_enabled;
-    web_ui()->CallJavascriptFunction("welcome.setSyncFooterVisible",
-                                     base::FundamentalValue(is_sync_enabled));
-  }
-}