Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/Widget.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2010 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 21 matching lines @@
 
 Widget::Widget()
     : m_parent(nullptr)
     , m_selfVisible(false)
     , m_parentVisible(false)
 {
 }
 
 Widget::~Widget()
 {
-#if !ENABLE(OILPAN)
-    ASSERT(!parent());
-#endif
 }
 
 DEFINE_TRACE(Widget)
 {
     visitor->trace(m_parent);
 }
 
 void Widget::setParent(Widget* widget)
 {
     ASSERT(!widget || !m_parent);
@@ skipping 110 matching lines @@
 {
     return point;
 }
 
 IntPoint Widget::convertSelfToChild(const Widget*, const IntPoint& point) const
 {
     return point;
 }
 
 } // namespace blink