Third patch in getting rid of caching MessageLoop pointers and always using C...

chrome/browser/browser_shutdown.cc

 // Copyright (c) 2009 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/browser_shutdown.h"
 
 #include "app/resource_bundle.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/time.h"
 #include "base/waitable_event.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/dom_ui/chrome_url_data_manager.h"
 #include "chrome/browser/first_run.h"
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/plugin_process_host.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
@@ skipping 56 matching lines @@
 #if defined(OS_WIN)
 FilePath GetShutdownMsPath() {
   FilePath shutdown_ms_file;
   PathService::Get(base::DIR_TEMP, &shutdown_ms_file);
   return shutdown_ms_file.AppendASCII(kShutdownMsFile);
 }
 #endif
 
 void Shutdown() {
   // Unload plugins. This needs to happen on the IO thread.
-  if (g_browser_process->io_thread()) {
-    g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+  ChromeThread::PostTask(
+        ChromeThread::IO, FROM_HERE,
         NewRunnableFunction(&ChromePluginLib::UnloadAllPlugins));
-  }
 
   // WARNING: During logoff/shutdown (WM_ENDSESSION) we may not have enough
   // time to get here. If you have something that *must* happen on end session,
   // consider putting it in BrowserProcessImpl::EndSession.
   DCHECK(g_browser_process);
 
   // Notifies we are going away.
   g_browser_process->shutdown_event()->Signal();
 
   PrefService* prefs = g_browser_process->local_state();
@@ skipping 103 matching lines @@
       UMA_HISTOGRAM_TIMES(time_per.c_str(),
                           TimeDelta::FromMilliseconds(shutdown_ms / num_procs));
       UMA_HISTOGRAM_COUNTS_100("Shutdown.renderers.total", num_procs);
       UMA_HISTOGRAM_COUNTS_100("Shutdown.renderers.slow", num_procs_slow);
     }
   }
 }
 #endif
 
 }  // namespace browser_shutdown