[Oilpan] Migrate classes under module/webgl onto oilpan heap

Source/modules/webgl/WebGLContextObject.cpp

 /*
  * Copyright (C) 2011 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 WebGLContextObject::WebGLContextObject(WebGLRenderingContextBase* context)
     : WebGLObject(context)
     , m_context(context)
 {
 }
 
 WebGLContextObject::~WebGLContextObject()
 {
 #if !ENABLE(OILPAN)
     if (m_context)
         m_context->removeContextObject(this);

[haraken, 2015/08/05 04:12:19]

You need to remove this because the removal is now handled by the weak
processing.

Make sure that you take care of all #if ENABLE(OILPAN)s and #if !ENABLE(OILPAN)s
in modules/webgl/ in this CL.

[peria, 2015/08/06 05:47:00]

Done.

 #endif
 }
 
 void WebGLContextObject::detachContext()
 {
     detach();
     if (m_context) {
         deleteObject(m_context->webContext());
         m_context->removeContextObject(this);
         m_context = nullptr;
     }
 }
 
 WebGraphicsContext3D* WebGLContextObject::getAWebGraphicsContext3D() const
 {
-    return m_context ? m_context->webContext() : 0;
+    return m_context ? m_context->webContext() : nullptr;
 }
 
 DEFINE_TRACE(WebGLContextObject)
 {
     visitor->trace(m_context);
     WebGLObject::trace(visitor);
 }
 
 } // namespace blink