Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/safe_browsing/database_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_DATABASE_MANAGER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_DATABASE_MANAGER_H_
 
 #include <deque>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/time.h"
 #include "chrome/browser/safe_browsing/protocol_manager.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
-#include "content/public/browser/browser_thread.h"
 #include "googleurl/src/gurl.h"
 
 class SafeBrowsingService;
 class SafeBrowsingDatabase;
 
 namespace base {
 class Thread;
 }
 
 namespace net {
@@ skipping 331 matching lines @@
   // without waiting for the result.
   int64 download_urlcheck_timeout_ms_;
 
   // Similar to |download_urlcheck_timeout_ms_|, but for download hash checks.
   int64 download_hashcheck_timeout_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingDatabaseManager);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_DATABASE_MANAGER_H_