base::Bind: Cleanup in automation.

base/message_loop.h

 // Copyright (c) 2011 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 224 matching lines @@
   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();
 
   // Signals the Run method to return after it is done processing all pending
   // messages.  This method may only be called on the same thread that called
   // Run, and Run must still be on the call stack.
   //
-  // Use QuitTask if you need to Quit another thread's MessageLoop, but note
-  // that doing so is fairly dangerous if the target thread makes nested calls
-  // to MessageLoop::Run.  The problem being that you won't know which nested
-  // run loop you are quiting, so be careful!
-  //
+  // Use QuitTask or QuitClosure if you need to Quit another thread's
+  // MessageLoop, but note that doing so is fairly dangerous if the target
+  // thread makes nested calls to MessageLoop::Run.  The problem being that you
+  // won't know which nested run loop you are quitting, so be careful!
   void Quit();
 
   // This method is a variant of Quit, that does not wait for pending messages
   // to be processed before returning from Run.
   void QuitNow();
 
   // Invokes Quit on the current MessageLoop when run.  Useful to schedule an
   // arbitrary MessageLoop to Quit.
+  // TODO(jhawkins): Remove once task.h is removed.
   class QuitTask : public Task {
    public:
     virtual void Run() {
       MessageLoop::current()->Quit();
     }
   };
 
+  // Invokes Quit on the current MessageLoop when run. Useful to schedule an
+  // arbitrary MessageLoop to Quit.
+  static base::Closure QuitClosure();
+
   // Returns the type passed to the constructor.
   Type type() const { return type_; }
 
   // Optional call to connect the thread name with this loop.
   void set_thread_name(const std::string& thread_name) {
     DCHECK(thread_name_.empty()) << "Should not rename this thread!";
     thread_name_ = thread_name;
   }
   const std::string& thread_name() const { return thread_name_; }
 
@@ skipping 432 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_