Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/safe_browsing/ui_manager.h

 // Copyright (c) 2012 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.
 //
 // The Safe Browsing service is responsible for downloading anti-phishing and
 // anti-malware tables and checking urls against them.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/time.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "googleurl/src/gurl.h"
 
 class SafeBrowsingService;
 
 namespace base {
 class Thread;
 }
 
 // Construction needs to happen on the main thread.
@@ skipping 122 matching lines @@
 
   // Only access this whitelist from the UI thread.
   std::vector<WhiteListedEntry> white_listed_entries_;
 
   ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingUIManager);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_