Remove task.h and finish base::Bind() migration.

chrome/browser/safe_browsing/safe_browsing_database.h

 // 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_
 #pragma once
 
 #include <set>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
-#include "base/task.h"
 #include "chrome/browser/safe_browsing/safe_browsing_store.h"
 
 namespace base {
   class Time;
 }
 
 namespace safe_browsing {
 class PrefixSet;
 }
 
@@ skipping 348 matching lines @@
 
   // Set to true if any chunks are added or deleted during an update.
   // Used to optimize away database update.
   bool change_detected_;
 
   // Used to check if a prefix was in the database.
   scoped_ptr<safe_browsing::PrefixSet> prefix_set_;
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_