Revert "Revert "Const-ify RefCountedThreadSafe::AddRef and Release.""

base/message_loop.h

 // 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.
 
 #ifndef BASE_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_H_
 #pragma once
 
 #include <queue>
 #include <string>
@@ skipping 128 matching lines @@
   // A variant on PostTask that deletes the given object.  This is useful
   // if the object needs to live until the next run of the MessageLoop (for
   // example, deleting a RenderProcessHost from within an IPC callback is not
   // good).
   //
   // NOTE: This method may be called on any thread.  The object will be deleted
   // on the thread that executes MessageLoop::Run().  If this is not the same
   // as the thread that calls PostDelayedTask(FROM_HERE, ), then T MUST inherit
   // from RefCountedThreadSafe<T>!
   template <class T>
-  void DeleteSoon(const tracked_objects::Location& from_here, T* object) {
+  void DeleteSoon(const tracked_objects::Location& from_here, const T* object) {
     PostNonNestableTask(from_here, new DeleteTask<T>(object));
   }
 
   // A variant on PostTask that releases the given reference counted object
   // (by calling its Release method).  This is useful if the object needs to
   // live until the next run of the MessageLoop, or if the object needs to be
   // released on a particular thread.
   //
   // NOTE: This method may be called on any thread.  The object will be
   // released (and thus possibly deleted) on the thread that executes
   // MessageLoop::Run().  If this is not the same as the thread that calls
   // PostDelayedTask(FROM_HERE, ), then T MUST inherit from
   // RefCountedThreadSafe<T>!
   template <class T>
-  void ReleaseSoon(const tracked_objects::Location& from_here, T* object) {
+  void ReleaseSoon(const tracked_objects::Location& from_here,
+                   const T* object) {
     PostNonNestableTask(from_here, new ReleaseTask<T>(object));
   }
 
   // Run the message loop.
   void Run();
 
   // Process all pending tasks, windows messages, etc., but don't wait/sleep.
   // Return as soon as all items that can be run are taken care of.
   void RunAllPending();
 
@@ skipping 423 matching lines @@
 #endif  // defined(OS_POSIX)
 };
 
 // Do not add any member variables to MessageLoopForIO!  This is important b/c
 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
                MessageLoopForIO_should_not_have_extra_member_variables);
 
 #endif  // BASE_MESSAGE_LOOP_H_