[mojo-edk] Expose notification source to MojoWatch callbacks

mojo/edk/system/watcher.cc

 // 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.
 
 #include "mojo/edk/system/watcher.h"
 
 #include "mojo/edk/system/handle_signals_state.h"
 #include "mojo/edk/system/request_context.h"
 
 namespace mojo {
 namespace edk {
 
 Watcher::Watcher(MojoHandleSignals signals, const WatchCallback& callback)
     : signals_(signals), callback_(callback) {
 }
 
 void Watcher::MaybeInvokeCallback(MojoResult result,
-                                  const HandleSignalsState& state) {
+                                  const HandleSignalsState& state,
+                                  MojoWatchNotificationFlags flags) {
   base::AutoLock lock(lock_);
   if (is_cancelled_)
     return;
 
-  callback_.Run(result, state);
+  callback_.Run(result, state, flags);
 }
 
 void Watcher::NotifyForStateChange(const HandleSignalsState& signals_state) {
   RequestContext* request_context = RequestContext::current();
   if (signals_state.satisfies(signals_)) {
     request_context->AddWatchNotifyFinalizer(
         make_scoped_refptr(this), MOJO_RESULT_OK, signals_state);
   } else if (!signals_state.can_satisfy(signals_)) {
-    request_context->AddWatchNotifyFinalizer(make_scoped_refptr(this),
-                                             MOJO_RESULT_FAILED_PRECONDITION,
-                                             signals_state);
+    request_context->AddWatchNotifyFinalizer(
+        make_scoped_refptr(this), MOJO_RESULT_FAILED_PRECONDITION,
+        signals_state);
   }
 }
 
 void Watcher::NotifyClosed() {
   static const HandleSignalsState closed_state = {0, 0};
   RequestContext::current()->AddWatchNotifyFinalizer(
       make_scoped_refptr(this), MOJO_RESULT_CANCELLED, closed_state);
 }
 
 void Watcher::Cancel() {
   base::AutoLock lock(lock_);
   is_cancelled_ = true;
 }
 
 Watcher::~Watcher() {}
 
 }  // namespace edk
 }  // namespace mojo