Clean up dns prefetch code, and also port it.

chrome/browser/chrome_plugin_host.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.
 
 #include "chrome/browser/chrome_plugin_host.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/gfx/png_encoder.h"
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/perftimer.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/chrome_plugin_browsing_context.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/dom_ui/html_dialog_contents.h"
 #include "chrome/browser/gears_integration.h"
-#include "chrome/browser/net/dns_master.h"
 #include "chrome/browser/plugin_process_host.h"
 #include "chrome/browser/plugin_service.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_counters.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_plugin_lib.h"
 #include "chrome/common/chrome_plugin_util.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 765 matching lines @@
 void CPHandleCommand(int command, CPCommandInterface* data,
                      CPBrowsingContext context) {
   // Sadly if we try and pass context through, we seem to break cl's little
   // brain trying to compile the Tuple3 ctor. This cast works.
   int32 context_as_int32 = static_cast<int32>(context);
   // Plugins can only be accessed on the IO thread.
   g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
       NewRunnableFunction(PluginCommandHandler::HandleCommand,
                           command, data, context_as_int32));
 }