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

chrome/browser/alternate_nav_url_fetcher.cc

Index: chrome/browser/alternate_nav_url_fetcher.cc
===================================================================
--- chrome/browser/alternate_nav_url_fetcher.cc	(revision 116288)
+++ chrome/browser/alternate_nav_url_fetcher.cc	(working copy)
@@ -22,6 +22,7 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
+using content::NavigationController;
 using content::OpenURLParams;
 using content::Referrer;
 
@@ -119,15 +120,15 @@
       // If we've already received a notification for the same controller, we
       // should delete ourselves as that indicates that the page is being
       // re-loaded so this instance is now stale.
-      content::NavigationController* controller =
-          content::Source<content::NavigationController>(source).ptr();
+      NavigationController* controller =
+          content::Source<NavigationController>(source).ptr();
       if (controller_ == controller) {
         delete this;
       } else if (!controller_) {
         // Start listening for the commit notification.
         DCHECK(controller->GetPendingEntry());
         registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-                       content::Source<content::NavigationController>(
+                       content::Source<NavigationController>(
                           controller));
         StartFetch(controller);
       }
@@ -136,7 +137,7 @@
 
     case chrome::NOTIFICATION_INSTANT_COMMITTED: {
       // See above.
-      content::NavigationController* controller =
+      NavigationController* controller =
           &content::Source<TabContentsWrapper>(source)->
               web_contents()->GetController();
       if (controller_ == controller) {
@@ -151,8 +152,7 @@
     case content::NOTIFICATION_NAV_ENTRY_COMMITTED:
       // The page was navigated, we can show the infobar now if necessary.
       registrar_.Remove(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-                        content::Source<content::NavigationController>(
-                            controller_));
+                        content::Source<NavigationController>(controller_));
       navigated_to_entry_ = true;
       ShowInfobarIfPossible();
       // WARNING: |this| may be deleted!
@@ -179,11 +179,10 @@
   // WARNING: |this| may be deleted!
 }
 
-void AlternateNavURLFetcher::StartFetch(
-      content::NavigationController* controller) {
+void AlternateNavURLFetcher::StartFetch(NavigationController* controller) {
   controller_ = controller;
   registrar_.Add(this, content::NOTIFICATION_TAB_CLOSED,
-                 content::Source<content::NavigationController>(controller_));
+                 content::Source<NavigationController>(controller_));
 
   DCHECK_EQ(NOT_STARTED, state_);
   state_ = IN_PROGRESS;