Mojo bindings environment: remove usage in mojo/edk/js

mojo/message_pump/handle_watcher.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_MESSAGE_PUMP_HANDLE_WATCHER_H_
 #define MOJO_MESSAGE_PUMP_HANDLE_WATCHER_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 27 matching lines @@
   // before the handle is ready, then |callback| is invoked with a result of
   // MOJO_RESULT_ABORTED.
   void Start(const Handle& handle,
              MojoHandleSignals handle_signals,
              MojoDeadline deadline,
              const base::Callback<void(MojoResult)>& callback);
 
   // Stops listening. Does nothing if not in the process of listening.
   void Stop();
 
+  bool is_watching() const { return !!state_; }
+
  private:
   class StateBase;
   class SameThreadWatchingState;
   class SecondaryThreadWatchingState;
 
   // If non-NULL Start() has been invoked.
   scoped_ptr<StateBase> state_;
 
   DISALLOW_COPY_AND_ASSIGN(HandleWatcher);
 };
 
 }  // namespace common
 }  // namespace mojo
 
 #endif  // MOJO_MESSAGE_PUMP_HANDLE_WATCHER_H_