Move MainThreadTaskRunner off Oilpan heap to simplify posting.

third_party/WebKit/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 28 matching lines @@
 namespace blink {
 
 static void markBoolean(bool* toBeMarked)
 {
     *toBeMarked = true;
 }
 
 TEST(MainThreadTaskRunnerTest, PostTask)
 {
     NullExecutionContext* context = new NullExecutionContext();
-    MainThreadTaskRunner* runner = MainThreadTaskRunner::create(context);
+    OwnPtr<MainThreadTaskRunner> runner = MainThreadTaskRunner::create(context);
     bool isMarked = false;
 
     runner->postTask(BLINK_FROM_HERE, createSameThreadTask(&markBoolean, &isMarked));
     EXPECT_FALSE(isMarked);
     blink::testing::runPendingTasks();
     EXPECT_TRUE(isMarked);
 }
 
 TEST(MainThreadTaskRunnerTest, SuspendTask)
 {
     NullExecutionContext* context = new NullExecutionContext();
-    MainThreadTaskRunner* runner = MainThreadTaskRunner::create(context);
+    OwnPtr<MainThreadTaskRunner> runner = MainThreadTaskRunner::create(context);
     bool isMarked = false;
 
     context->setTasksNeedSuspension(true);
     runner->postTask(BLINK_FROM_HERE, createSameThreadTask(&markBoolean, &isMarked));
     runner->suspend();
     blink::testing::runPendingTasks();
     EXPECT_FALSE(isMarked);
 
     context->setTasksNeedSuspension(false);
     runner->resume();
     blink::testing::runPendingTasks();
     EXPECT_TRUE(isMarked);
 }
 
 TEST(MainThreadTaskRunnerTest, RemoveRunner)
 {
     NullExecutionContext* context = new NullExecutionContext();
-    MainThreadTaskRunner* runner = MainThreadTaskRunner::create(context);
+    OwnPtr<MainThreadTaskRunner> runner = MainThreadTaskRunner::create(context);
     bool isMarked = false;
 
     context->setTasksNeedSuspension(true);
     runner->postTask(BLINK_FROM_HERE, createSameThreadTask(&markBoolean, &isMarked));
     runner = nullptr;
     blink::testing::runPendingTasks();
     EXPECT_FALSE(isMarked);
 }
 
 } // namespace blink