Add different behavior to AwakableList for "persistent" vs "one-shot" awakables.

mojo/edk/system/simple_dispatcher.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/simple_dispatcher.h"
 
 #include "base/logging.h"
 
 namespace mojo {
 namespace system {
 
 SimpleDispatcher::SimpleDispatcher() {}
 
 SimpleDispatcher::~SimpleDispatcher() {}
 
 void SimpleDispatcher::OnHandleSignalsStateChangeNoLock(
     const HandleSignalsState& old_state,
     const HandleSignalsState& new_state) {
   mutex().AssertHeld();
   awakable_list_.OnStateChange(old_state, new_state);
 }
 
 void SimpleDispatcher::CancelAllStateNoLock() {
   mutex().AssertHeld();
-  awakable_list_.CancelAll();
+  awakable_list_.CancelAndRemoveAll();
 }
 
 MojoResult SimpleDispatcher::AddAwakableImplNoLock(
     Awakable* awakable,
     uint64_t context,
-    bool force,
+    bool persistent,
     MojoHandleSignals signals,
     HandleSignalsState* signals_state) {
   mutex().AssertHeld();
 
   HandleSignalsState state(GetHandleSignalsStateImplNoLock());
   if (signals_state)
     *signals_state = state;
   if (state.satisfies(signals)) {
-    if (force)
-      awakable_list_.Add(awakable, context, signals);
+    if (persistent)
+      awakable_list_.Add(awakable, context, persistent, signals);
     return MOJO_RESULT_ALREADY_EXISTS;
   }
   if (!state.can_satisfy(signals)) {
-    if (force)
-      awakable_list_.Add(awakable, context, signals);
+    if (persistent)
+      awakable_list_.Add(awakable, context, persistent, signals);
     return MOJO_RESULT_FAILED_PRECONDITION;
   }
 
-  awakable_list_.Add(awakable, context, signals);
+  awakable_list_.Add(awakable, context, persistent, signals);
   return MOJO_RESULT_OK;
 }
 
 void SimpleDispatcher::RemoveAwakableImplNoLock(
     bool match_context,
     Awakable* awakable,
     uint64_t context,
     HandleSignalsState* signals_state) {
   mutex().AssertHeld();
   awakable_list_.Remove(match_context, awakable, context);
   if (signals_state)
     *signals_state = GetHandleSignalsStateImplNoLock();
 }
 
 }  // namespace system
 }  // namespace mojo