Make RunLoop remove handle when a timeout is notified

mojo/public/utility/run_loop.h

 // Copyright 2013 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 MOJO_PUBLIC_UTILITY_RUN_LOOP_H_
 #define MOJO_PUBLIC_UTILITY_RUN_LOOP_H_
 
 #include <map>
 
 #include "mojo/public/system/core_cpp.h"
@@ skipping 19 matching lines @@
   // created.
   static RunLoop* current();
 
   // Registers a RunLoopHandler for the specified handle. Only one handler can
   // be registered for a specified handle.
   void AddHandler(RunLoopHandler* handler,
                   const Handle& handle,
                   MojoWaitFlags wait_flags,
                   MojoDeadline deadline);
   void RemoveHandler(const Handle& handle);
+  bool HasHandler(const Handle& handle) const;
 
   // Runs the loop servicing handles as they are ready. This returns when Quit()
   // is invoked, or there no more handles.
   void Run();
   void Quit();
 
  private:
   struct RunState;
   struct WaitState;
 
@@ skipping 41 matching lines @@
   // notify it.
   int next_handler_id_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(RunLoop);
 };
 
 }  // namespace utility
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_UTILITY_RUN_LOOP_H_