Oilpan: remove unnecessary MultisamplingChangedObserver unregistration.

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 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 1171 matching lines @@
         tracker->loseExtension(true);
     }
     m_extensions.clear();
 
     // Context must be removed from the group prior to the destruction of the
     // WebGraphicsContext3D, otherwise shared objects may not be properly deleted.
     m_contextGroup->removeContext(this);
 
     destroyContext();
 
+#if !ENABLE(OILPAN)
     if (m_multisamplingObserverRegistered) {
         if (Page* page = canvas()->document().page())
             page->removeMultisamplingChangedObserver(this);
     }
+#endif
 
     willDestroyContext(this);
 }
 
 void WebGLRenderingContextBase::destroyContext()
 {
     if (!drawingBuffer())
         return;
 
     m_extensionsUtil.clear();
@@ skipping 5815 matching lines @@
         webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
 }
 
 void WebGLRenderingContextBase::restoreUnpackParameters()
 {
     if (m_unpackAlignment != 1)
         webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
 }
 
 } // namespace blink