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

chrome/browser/omnibox_search_hint.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/omnibox_search_hint.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
@@ skipping 20 matching lines @@
 #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 "grit/generated_resources.h"
 #include "grit/theme_resources_standard.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
+using content::NavigationController;
 using content::NavigationEntry;
 
 // The URLs of search engines for which we want to trigger the infobar.
 const char* const kSearchEngineURLs[] = {
     "http://www.google.com/",
     "http://www.yahoo.com/",
     "http://www.bing.com/",
     "http://www.altavista.com/",
     "http://www.ask.com/",
     "http://www.wolframalpha.com/",
@@ skipping 96 matching lines @@
   UMA_HISTOGRAM_COUNTS("OmniboxSearchHint.ShowMe", 1);
   omnibox_hint_->DisableHint();
   omnibox_hint_->ShowEnteringQuery();
   return true;
 }
 
 
 // OmniboxSearchHint ----------------------------------------------------------
 
 OmniboxSearchHint::OmniboxSearchHint(TabContentsWrapper* tab) : tab_(tab) {
-  content::NavigationController* controller =
-      &(tab->web_contents()->GetController());
+  NavigationController* controller = &(tab->web_contents()->GetController());
   notification_registrar_.Add(
       this,
       content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-      content::Source<content::NavigationController>(controller));
+      content::Source<NavigationController>(controller));
   // Fill the search_engine_urls_ map, used for faster look-up (overkill?).
   for (size_t i = 0; i < arraysize(kSearchEngineURLs); ++i)
     search_engine_urls_[kSearchEngineURLs[i]] = 1;
 
   // Listen for omnibox to figure-out when the user searches from the omnibox.
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_OMNIBOX_OPENED_URL,
                               content::Source<Profile>(tab->profile()));
 }
 
@@ skipping 61 matching lines @@
 }
 
 // static
 bool OmniboxSearchHint::IsEnabled(Profile* profile) {
   // The infobar can only be shown if the correct switch has been provided and
   // the user did not dismiss the infobar before.
   return profile->GetPrefs()->GetBoolean(prefs::kShowOmniboxSearchHint) &&
       CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kSearchInOmniboxHint);
 }