Change the lifetime of the WebKit thread to be a subset of the IO thread's li...

chrome/browser/chrome_thread.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_thread.h"
 
 // Friendly names for the well-known threads.
 static const char* chrome_thread_names[ChromeThread::ID_COUNT] = {
   "Chrome_IOThread",  // IO
   "Chrome_FileThread",  // FILE
   "Chrome_DBThread",  // DB
+  "Chrome_WebKitThread",  // WEBKIT
   "Chrome_HistoryThread",  // HISTORY
 #if defined(OS_LINUX)
   "Chrome_Background_X11Thread",  // BACKGROUND_X11
 #endif
 };
 
 Lock ChromeThread::lock_;
 
 ChromeThread* ChromeThread::chrome_threads_[ID_COUNT] = {
   NULL,  // IO
   NULL,  // FILE
   NULL,  // DB
+  NULL,  // WEBKIT
   NULL,  // HISTORY
 #if defined(OS_LINUX)
   NULL,  // BACKGROUND_X11
 #endif
 };
 
 ChromeThread::ChromeThread(ChromeThread::ID identifier)
     : Thread(chrome_thread_names[identifier]),
       identifier_(identifier) {
   AutoLock lock(lock_);
@@ skipping 10 matching lines @@
 // static
 MessageLoop* ChromeThread::GetMessageLoop(ID identifier) {
   AutoLock lock(lock_);
   DCHECK(identifier >= 0 && identifier < ID_COUNT);
 
   if (chrome_threads_[identifier])
     return chrome_threads_[identifier]->message_loop();
 
   return NULL;
 }
+
+// static
+bool ChromeThread::CurrentlyOn(ID identifier) {
+  // MessageLoop::current() will return NULL if none is running.  This is often
+  // true when running under unit tests.  This behavior actually works out
+  // pretty convienently (as is mentioned in the header file comment), but it's
+  // worth noting here.
+  MessageLoop* message_loop = GetMessageLoop(identifier);
+  return MessageLoop::current() == message_loop;
+}