Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/dom/MainThreadTaskRunnerTest.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2013 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 24 matching lines @@
 #include <gtest/gtest.h>
 
 using namespace WebCore;
 
 namespace {
 
 class NullEventQueue : public EventQueue {
 public:
     NullEventQueue() { }
     virtual ~NullEventQueue() { }
-    virtual bool enqueueEvent(PassRefPtr<Event>) OVERRIDE { return true; }
+    virtual bool enqueueEvent(PassRefPtrWillBeRawPtr<Event>) OVERRIDE { return true; }
     virtual bool cancelEvent(Event*) OVERRIDE { return true; }
     virtual void close() OVERRIDE { }
 };
 
 class NullExecutionContext : public ExecutionContext, public RefCounted<NullExecutionContext> {
 public:
     using RefCounted<NullExecutionContext>::ref;
     using RefCounted<NullExecutionContext>::deref;
 
     virtual void refExecutionContext() OVERRIDE { ref(); }
@@ skipping 74 matching lines @@
     bool isMarked = false;
 
     context->setTasksNeedSuspention(true);
     runner->postTask(MarkingBooleanTask::create(&isMarked));
     runner.clear();
     WebCore::testing::runPendingTasks();
     EXPECT_FALSE(isMarked);
 }
 
 }