Replace ScopedThreadProxy with MessageLoopProxy & WeakPtrs.

remoting/base/scoped_thread_proxy.h

-// Copyright (c) 2012 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 REMOTING_BASE_SCOPED_THREAD_PROXY_H_
-#define REMOTING_BASE_SCOPED_THREAD_PROXY_H_
-
-#include "base/callback_forward.h"
-#include "base/message_loop_proxy.h"
-
-namespace remoting {
-
-// ScopedThreadProxy is proxy for message loops that cancels all
-// pending tasks when it is destroyed. It can be used to post tasks
-// for a non-refcounted object. Must be deleted on the thread it
-// belongs to.
-//
-//
-// The main difference from WeakPtr<> is that this class can be used safely to
-// post tasks from different threads.
-// It is similar to WeakHandle<> used in sync: the main difference is
-// that WeakHandle<> creates closures itself, while ScopedThreadProxy
-// accepts base::Closure instances which caller needs to create using
-// base::Bind().
-//
-// TODO(sergeyu): Potentially we could use WeakHandle<> instead of
-// this class. Consider migrating to WeakHandle<> when it is moved to
-// src/base and support for delayed tasks is implemented.
-//
-// Usage:
-//   class MyClass {
-//    public:
-//     MyClass()
-//         : thread_proxy_(base::MessageLoopProxy::current()) {}
-//
-//     // Always called on the thread on which this object was created.
-//     void NonThreadSafeMethod() {}
-//
-//     // Can be called on any thread.
-//     void ThreadSafeMethod() {
-//       thread_proxy_.PostTask(FROM_HERE, base::Bind(
-//           &MyClass::NonThreadSafeMethod, base::Unretained(this)));
-//     }
-//
-//    private:
-//     ScopedThreadProxy thread_proxy_;
-//   };
-class ScopedThreadProxy {
- public:
-  ScopedThreadProxy(base::MessageLoopProxy* message_loop);
-  ~ScopedThreadProxy();
-
-  void PostTask(const tracked_objects::Location& from_here,
-                const base::Closure& closure);
-  void PostDelayedTask(const tracked_objects::Location& from_here,
-                       const base::Closure& closure,
-                       int64 delay_ms);
-
-  // Cancels all tasks posted via this proxy. Must be called on the
-  // thread this object belongs to.
-  void Detach();
-
- private:
-  class Core;
-
-  scoped_refptr<Core> core_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedThreadProxy);
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_BASE_SCOPED_THREAD_PROXY_H_