Get rid of content::NavigationController in cc file and use "using" instead.

chrome/browser/ui/webui/sync_promo/sync_promo_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/sync_promo/sync_promo_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/sync_setup_flow.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/webui/sync_promo/sync_promo_trial.h"
 #include "chrome/browser/ui/webui/sync_promo/sync_promo_ui.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/web_contents.h"
 
+using content::NavigationController;
 using content::OpenURLParams;
 using content::Referrer;
 
 namespace {
 
 // User actions on the sync promo (aka "Sign in to Chrome").
 enum SyncPromoUserFlowActionEnums {
   SYNC_PROMO_VIEWED,
   SYNC_PROMO_LEARN_MORE_CLICKED,
   SYNC_PROMO_ACCOUNT_HELP_CLICKED,
@@ skipping 44 matching lines @@
   // Keep a reference to the preferences service for convenience and it's
   // probably a little faster that getting it via Profile::FromWebUI() every
   // time we need to interact with preferences.
   prefs_ = Profile::FromWebUI(web_ui())->GetPrefs();
   DCHECK(prefs_);
   // Ignore events from view-source:chrome://syncpromo.
   if (!web_ui()->web_contents()->GetController().GetActiveEntry()->
           IsViewSourceMode()) {
     // Listen to see if the tab we're in gets closed.
     registrar_.Add(this, content::NOTIFICATION_TAB_CLOSING,
-        content::Source<content::NavigationController>(
+        content::Source<NavigationController>(
             &web_ui()->web_contents()->GetController()));
     // Listen to see if the window we're in gets closed.
     registrar_.Add(this, chrome::NOTIFICATION_BROWSER_CLOSING,
         content::NotificationService::AllSources());
   }
 
   web_ui()->RegisterMessageCallback("SyncPromo:Close",
       base::Bind(&SyncPromoHandler::HandleCloseSyncPromo,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("SyncPromo:Initialize",
@@ skipping 187 matching lines @@
     Profile* profile = Profile::FromWebUI(web_ui());
     sync_promo_trial::RecordUserSignedInWithTrialBrand(is_start_up, profile);
   }
 }
 
 void SyncPromoHandler::RecordUserFlowAction(int action) {
   // Send an enumeration to our single user flow histogram.
   UMA_HISTOGRAM_ENUMERATION("SyncPromo.UserFlow", action,
                             SYNC_PROMO_BUCKET_BOUNDARY);
 }