[mojo-edk] Expose notification source to MojoWatch callbacks

mojo/public/cpp/system/watcher.h

 // Copyright 2016 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_CPP_SYSTEM_WATCHER_H_
 #define MOJO_PUBLIC_CPP_SYSTEM_WATCHER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 66 matching lines @@
   void Cancel();
 
  private:
   class MessageLoopObserver;
   friend class MessageLoopObserver;
 
   void OnHandleReady(MojoResult result);
 
   static void CallOnHandleReady(uintptr_t context,
                                 MojoResult result,
-                                MojoHandleSignalsState signals_state);
+                                MojoHandleSignalsState signals_state,
+                                MojoWatchNotificationFlags flags);
 
   base::ThreadChecker thread_checker_;
 
   // The TaskRunner of this Watcher's owning thread. This field is safe to
   // access from any thread.
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   scoped_ptr<MessageLoopObserver> message_loop_observer_;
 
   // A persistent weak reference to this Watcher which can be passed to the
@@ skipping 10 matching lines @@
   ReadyCallback callback_;
 
   base::WeakPtrFactory<Watcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Watcher);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_SYSTEM_WATCHER_H_