Reduce the amount of included header files. Vast change like in "Oh God! This...

chrome/browser/net/dns_master.cc

 // Copyright (c) 2006-2008 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.
 
 // See header file for description of class
 
 #include "chrome/browser/net/dns_master.h"
 
-#include <sstream>
+#include <set>
 
 #include "base/histogram.h"
 #include "base/stats_counters.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/win_util.h"
 #include "chrome/browser/net/dns_slave.h"
 
 using base::TimeDelta;
 
@@ skipping 558 matching lines @@
     if (!motivating_host->Get(1, &subresource_list))
       continue;
     if (motivating_referrer.empty())
       continue;
     referrers_[motivating_referrer].Deserialize(*subresource_list);
   }
 }
 
 }  // namespace chrome_browser_net