Make WaitableEventWatcher TaskScheduler-friendly.

base/synchronization/waitable_event_watcher_unittest.cc

 // Copyright (c) 2012 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 "base/synchronization/waitable_event_watcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 34 matching lines @@
 };
 
 void RunTest_BasicSignal(MessageLoop::Type message_loop_type) {
   MessageLoop message_loop(message_loop_type);
 
   // A manual-reset event that is not yet signaled.
   WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
                       WaitableEvent::InitialState::NOT_SIGNALED);
 
   WaitableEventWatcher watcher;
-  EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
-
   watcher.StartWatching(&event, Bind(&QuitWhenSignaled));
-  EXPECT_EQ(&event, watcher.GetWatchedEvent());
 
   event.Signal();
 
   RunLoop().Run();
-
-  EXPECT_TRUE(watcher.GetWatchedEvent() == NULL);
 }
 
 void RunTest_BasicCancel(MessageLoop::Type message_loop_type) {
   MessageLoop message_loop(message_loop_type);
 
   // A manual-reset event that is not yet signaled.
   WaitableEvent event(WaitableEvent::ResetPolicy::MANUAL,
                       WaitableEvent::InitialState::NOT_SIGNALED);
 
   WaitableEventWatcher watcher;
@@ skipping 94 matching lines @@
   }
 }
 
 TEST(WaitableEventWatcherTest, DeleteUnder) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
     RunTest_DeleteUnder(testing_message_loops[i]);
   }
 }
 
 }  // namespace base