Oilpan: Remove OffHeapCollectionTrait

Source/core/html/canvas/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 6120 matching lines @@
     visitor->trace(m_texture2DBinding);
     visitor->trace(m_textureCubeMapBinding);
     visitor->trace(m_texture3DBinding);
     visitor->trace(m_texture2DArrayBinding);
 }
 
 DEFINE_TRACE(WebGLRenderingContextBase)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_contextObjects);
-#endif
     visitor->trace(m_contextLostCallbackAdapter);
     visitor->trace(m_errorMessageCallbackAdapter);
     visitor->trace(m_boundArrayBuffer);
     visitor->trace(m_defaultVertexArrayObject);
     visitor->trace(m_boundVertexArrayObject);
     visitor->trace(m_vertexAttrib0Buffer);
     visitor->trace(m_currentProgram);
     visitor->trace(m_framebufferBinding);
     visitor->trace(m_renderbufferBinding);
     visitor->trace(m_valuebufferBinding);
     visitor->trace(m_textureUnits);
     visitor->trace(m_blackTexture2D);
     visitor->trace(m_blackTextureCubeMap);
     visitor->trace(m_requestedAttributes);
     visitor->trace(m_extensions);
+#endif
     CanvasRenderingContext::trace(visitor);
 }
 
 int WebGLRenderingContextBase::externallyAllocatedBytesPerPixel()
 {
     if (isContextLost())
         return 0;
 
     int bytesPerPixel = 4;
     int totalBytesPerPixel = bytesPerPixel * 2; // WebGL's front and back color buffers.
@@ skipping 27 matching lines @@
     return m_sharedWebGraphicsContext3D ? m_sharedWebGraphicsContext3D->drawingBuffer() : 0;
 }
 #else
 DrawingBuffer* WebGLRenderingContextBase::drawingBuffer() const
 {
     return m_drawingBuffer.get();
 }
 #endif
 
 } // namespace blink