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

chrome/browser/jankometer.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 <limits>
 
 #include "chrome/browser/jankometer.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/ref_counted.h"
 #include "base/stats_counters.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/time.h"
 #include "base/watchdog.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_thread.h"
 #include "chrome/common/chrome_switches.h"
 
 #if defined(OS_LINUX)
 #include "chrome/common/gtk_util.h"
 #endif
 
 using base::TimeDelta;
 using base::TimeTicks;
 
 namespace {
@@ skipping 211 matching lines @@
   ui_observer->AttachToCurrentThread();
 
   // Now install on the I/O thread. Hiccups on that thread will block
   // interaction with web pages. We must proxy to that thread before we can
   // add our observer.
   io_observer = new JankObserver(
       "IO",
       TimeDelta::FromMilliseconds(kMaxIOMessageDelayMs),
       io_watchdog_enabled);
   io_observer->AddRef();
-  base::Thread* io_thread = g_browser_process->io_thread();
-  if (io_thread) {
-    io_thread->message_loop()->PostTask(FROM_HERE,
-        NewRunnableMethod(io_observer,
-            &JankObserver::AttachToCurrentThread));
-  }
+  ChromeThread::PostTask(
+      ChromeThread::IO, FROM_HERE,
+      NewRunnableMethod(io_observer, &JankObserver::AttachToCurrentThread));
 }
 
 void UninstallJankometer() {
   if (ui_observer) {
     ui_observer->DetachFromCurrentThread();
     ui_observer->Release();
     ui_observer = NULL;
   }
   if (io_observer) {
     // IO thread can't be running when we remove observers.
     DCHECK((!g_browser_process) || !(g_browser_process->io_thread()));
     io_observer->Release();
     io_observer = NULL;
   }
 }