Oilpan: fix build after r200992.

Source/core/dom/ScriptedIdleTaskController.cpp

 // Copyright 2015 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 "config.h"
 #include "core/dom/ScriptedIdleTaskController.h"
 
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/IdleRequestCallback.h"
 #include "core/loader/DocumentLoadTiming.h"
@@ skipping 49 matching lines @@
 ScriptedIdleTaskController::ScriptedIdleTaskController(ExecutionContext* context, const DocumentLoadTiming& timing)
     : ActiveDOMObject(context)
     , m_timing(timing)
     , m_scheduler(Platform::current()->currentThread()->scheduler())
     , m_nextCallbackId(0)
     , m_suspended(false)
 {
     suspendIfNeeded();
 }
 
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(ScriptedIdleTaskController);
+ScriptedIdleTaskController::~ScriptedIdleTaskController()
+{
+}
 
 DEFINE_TRACE(ScriptedIdleTaskController)
 {
+    visitor->trace(m_callbacks);
     ActiveDOMObject::trace(visitor);
-    visitor->trace(m_callbacks);
 }
 
 ScriptedIdleTaskController::CallbackId ScriptedIdleTaskController::registerCallback(IdleRequestCallback* callback, double timeoutMillis)
 {
     CallbackId id = ++m_nextCallbackId;
     m_callbacks.set(id, callback);
 
     RefPtr<internal::IdleRequestCallbackWrapper> callbackWrapper = internal::IdleRequestCallbackWrapper::create(id, this);
     m_scheduler->postIdleTask(FROM_HERE, WTF::bind<double>(&internal::IdleRequestCallbackWrapper::idleTaskFired, callbackWrapper));
     if (timeoutMillis > 0)
@@ skipping 65 matching lines @@
         m_scheduler->postIdleTask(FROM_HERE, WTF::bind<double>(&internal::IdleRequestCallbackWrapper::idleTaskFired, callbackWrapper));
     }
 }
 
 bool ScriptedIdleTaskController::hasPendingActivity() const
 {
     return !m_callbacks.isEmpty();
 }
 
 } // namespace blink