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

chrome/browser/printing/print_preview_tab_controller.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/printing/print_preview_tab_controller.h"
 
 #include <algorithm>
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 22 matching lines @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "webkit/plugins/webplugininfo.h"
 
+using content::NavigationController;
 using content::WebContents;
 using content::WebUIMessageHandler;
 
 namespace {
 
 void EnableInternalPDFPluginForTab(TabContentsWrapper* preview_tab) {
   // Always enable the internal PDF plugin for the print preview page.
   ChromePluginServiceFilter::GetInstance()->OverridePluginForTab(
         preview_tab->web_contents()->GetRenderProcessHost()->GetID(),
         preview_tab->web_contents()->GetRenderViewHost()->routing_id(),
@@ skipping 162 matching lines @@
       break;
     }
     case content::NOTIFICATION_WEB_CONTENTS_DESTROYED: {
       WebContents* tab = content::Source<WebContents>(source).ptr();
       TabContentsWrapper* wrapper =
           TabContentsWrapper::GetCurrentWrapperForContents(tab);
       OnTabContentsDestroyed(wrapper);
       break;
     }
     case content::NOTIFICATION_NAV_ENTRY_COMMITTED: {
-      content::NavigationController* controller =
-          content::Source<content::NavigationController>(source).ptr();
+      NavigationController* controller =
+          content::Source<NavigationController>(source).ptr();
       TabContentsWrapper* wrapper =
           TabContentsWrapper::GetCurrentWrapperForContents(
               controller->GetWebContents());
       content::LoadCommittedDetails* load_details =
           content::Details<content::LoadCommittedDetails>(details).ptr();
       OnNavEntryCommitted(wrapper, load_details);
       break;
     }
     default: {
       NOTREACHED();
@@ skipping 172 matching lines @@
         initiator_tab->print_view_manager()->RenderSourceName());
   }
 }
 
 void PrintPreviewTabController::AddObservers(TabContentsWrapper* tab) {
   WebContents* contents = tab->web_contents();
   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
                  content::Source<WebContents>(contents));
   registrar_.Add(
       this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-      content::Source<content::NavigationController>(
-          &contents->GetController()));
+      content::Source<NavigationController>(&contents->GetController()));
 
   // Multiple sites may share the same RenderProcessHost, so check if this
   // notification has already been added.
   content::RenderProcessHost* rph = tab->web_contents()->GetRenderProcessHost();
   if (!registrar_.IsRegistered(this,
                                content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                                content::Source<content::RenderProcessHost>(
                                   rph))) {
     registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                    content::Source<content::RenderProcessHost>(rph));
   }
 }
 
 void PrintPreviewTabController::RemoveObservers(TabContentsWrapper* tab) {
   WebContents* contents = tab->web_contents();
   registrar_.Remove(this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
                     content::Source<WebContents>(contents));
   registrar_.Remove(
       this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-      content::Source<content::NavigationController>(
-          &contents->GetController()));
+      content::Source<NavigationController>(&contents->GetController()));
 
   // Multiple sites may share the same RenderProcessHost, so check if this
   // notification has already been added.
   content::RenderProcessHost* rph = tab->web_contents()->GetRenderProcessHost();
   if (registrar_.IsRegistered(this,
                               content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                               content::Source<content::RenderProcessHost>(
                                   rph))) {
     registrar_.Remove(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                       content::Source<content::RenderProcessHost>(rph));
@@ skipping 36 matching lines @@
   PrintPreviewUI* print_preview_ui =
       static_cast<PrintPreviewUI*>(preview_tab->web_contents()->GetWebUI());
   if (print_preview_ui)
     print_preview_ui->OnTabDestroyed();
 
   preview_tab_map_.erase(preview_tab);
   RemoveObservers(preview_tab);
 }
 
 }  // namespace printing