Simplify threading in browser thread by making only ChromeThread deal with di...

chrome/browser/chrome_plugin_browsing_context.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_browsing_context.h"
 
 #include "base/message_loop.h"
 #include "base/singleton.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/common/notification_service.h"
 
 CPBrowsingContextManager* CPBrowsingContextManager::Instance() {
-#ifndef NDEBUG
-  // IO loop is NULL in unit tests.
-  if (ChromeThread::GetMessageLoop(ChromeThread::IO)) {
-    DCHECK(MessageLoop::current() ==
-           ChromeThread::GetMessageLoop(ChromeThread::IO));
-  }
-#endif
+  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
   return Singleton<CPBrowsingContextManager>::get();
 }
 
 CPBrowsingContextManager::CPBrowsingContextManager() {
   registrar_.Add(this, NotificationType::URL_REQUEST_CONTEXT_RELEASED,
                  NotificationService::AllSources());
 }
 
 CPBrowsingContextManager::~CPBrowsingContextManager() {
 }
@@ skipping 28 matching lines @@
   URLRequestContext* context = Source<URLRequestContext>(source).ptr();
 
   // Multiple CPBrowsingContexts may refer to the same URLRequestContext.
   for (Map::iterator it(&map_); !it.IsAtEnd(); it.Advance()) {
     if (it.GetCurrentValue() == context)
       map_.Remove(it.GetCurrentKey());
   }
 
   reverse_map_.erase(context);
 }