Fifth patch in getting rid of caching MessageLoop pointers.

chrome/browser/chrome_thread.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROME_THREAD_H_
 #define CHROME_BROWSER_CHROME_THREAD_H_
 
 #include "base/lock.h"
 #include "base/task.h"
 #include "base/thread.h"
@@ skipping 95 matching lines @@
   template <class T>
   static bool ReleaseSoon(ID identifier,
                           const tracked_objects::Location& from_here,
                           T* object) {
     return PostNonNestableTask(
         identifier, from_here, new ReleaseTask<T>(object));
   }
 
   // Callable on any thread.  Returns whether you're currently on a particular
   // thread.
-  //
-  // WARNING:
-  //   When running under unit-tests, this will return true if you're on the
-  //   main thread and the thread ID you pass in isn't running.  This is
-  //   normally the correct behavior because you want to ignore these asserts
-  //   unless you've specifically spun up the threads, but be mindful of it.
   static bool CurrentlyOn(ID identifier);
 
   // If the current message loop is one of the known threads, returns true and
   // sets identifier to its ID.  Otherwise returns false.
   static bool GetCurrentThreadIdentifier(ID* identifier);
 
   // Use these templates in conjuction with RefCountedThreadSafe when you want
   // to ensure that an object is deleted on a specific thread.  This is needed
   // when an object can hop between threads (i.e. IO -> FILE -> IO), and thread
   // switching delays can mean that the final IO tasks executes before the FILE
@@ skipping 42 matching lines @@
   static Lock lock_;
 
   // An array of the ChromeThread objects.  This array is protected by |lock_|.
   // The threads are not owned by this array.  Typically, the threads are owned
   // on the UI thread by the g_browser_process object.  ChromeThreads remove
   // themselves from this array upon destruction.
   static ChromeThread* chrome_threads_[ID_COUNT];
 };
 
 #endif  // #ifndef CHROME_BROWSER_CHROME_THREAD_H_