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

chrome/browser/renderer_host/browser_render_process_host.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "chrome/browser/renderer_host/browser_render_process_host.h"
 
 #include "build/build_config.h"
@@ skipping 386 matching lines @@
   DCHECK_EQ(backgrounded_, (visible_widgets_ == 0));
   visible_widgets_--;
   DCHECK_GE(visible_widgets_, 0);
   if (visible_widgets_ == 0) {
     DCHECK(!backgrounded_);
     SetBackgrounded(true);
   }
 }
 
 void BrowserRenderProcessHost::AddWord(const string16& word) {
-  base::Thread* io_thread = g_browser_process->io_thread();
   SpellChecker* spellchecker = profile()->GetSpellChecker();
   if (spellchecker) {
-    io_thread->message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
-        spellchecker, &SpellChecker::AddWord, word));
+    ChromeThread::PostTask(
+        ChromeThread::IO, FROM_HERE,
+        NewRunnableMethod(spellchecker, &SpellChecker::AddWord, word));
   }
 }
 
 void BrowserRenderProcessHost::AddVisitedLinks(
     const VisitedLinkCommon::Fingerprints& links) {
   visited_link_updater_->AddLinks(links);
   if (visible_widgets_ == 0)
     return;
 
   visited_link_updater_->Update(this);
@@ skipping 611 matching lines @@
     profile()->GetExtensionMessageService()->RemoveEventListener(
         event_name, id());
   }
 }
 
 void BrowserRenderProcessHost::OnExtensionCloseChannel(int port_id) {
   if (profile()->GetExtensionMessageService()) {
     profile()->GetExtensionMessageService()->CloseChannel(port_id);
   }
 }