AwakableList: For persistent awakables, make Add() call Awake() with reason INITIALIZE.

mojo/edk/system/awakable_list.cc

 // 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.
 
 #include "mojo/edk/system/awakable_list.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "mojo/edk/system/awakable.h"
@@ skipping 58 matching lines @@
   for (auto it = awakables_.begin(); it != awakables_.end(); ++it) {
     it->awakable->Awake(it->context, Awakable::AwakeReason::CANCELLED,
                         HandleSignalsState());
   }
   awakables_.clear();
 }
 
 void AwakableList::Add(Awakable* awakable,
                        uint64_t context,
                        bool persistent,
-                       MojoHandleSignals signals) {
+                       MojoHandleSignals signals,
+                       const HandleSignalsState& current_state) {
   awakables_.push_back(AwakeInfo(awakable, context, persistent, signals));
+  if (persistent)
+    awakable->Awake(context, Awakable::AwakeReason::INITIALIZE, current_state);
 }
 
 void AwakableList::Remove(bool match_context,
                           Awakable* awakable,
                           uint64_t context) {
   // We allow a thread to wait on the same handle multiple times simultaneously,
   // so we need to scan the entire list and remove all occurrences of |waiter|.
   auto last = awakables_.end();
   for (AwakeInfoList::iterator it = awakables_.begin(); it != last;) {
     if (it->awakable == awakable &&
         (!match_context || it->context == context)) {
       --last;
       std::swap(*it, *last);
     } else {
       ++it;
     }
   }
   awakables_.erase(last, awakables_.end());
 }
 
 }  // namespace system
 }  // namespace mojo