Re-land "WebGL: Transfer ownership of WebGraphicsContext3D to DrawingBuffer"

Source/core/html/canvas/WebGLTexture.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 33 matching lines @@
     , m_wrapS(GL_REPEAT)
     , m_wrapT(GL_REPEAT)
     , m_isNPOT(false)
     , m_isCubeComplete(false)
     , m_isComplete(false)
     , m_needToUseBlackTexture(false)
     , m_isFloatType(false)
     , m_isHalfFloatType(false)
 {
     ScriptWrappable::init(this);
-    setObject(ctx->webGraphicsContext3D()->createTexture());
+    setObject(ctx->webContext()->createTexture());
 }
 
 WebGLTexture::~WebGLTexture()
 {
     deleteObject(0);
 }
 
 void WebGLTexture::setTarget(GLenum target, GLint maxLevel)
 {
     if (!object())
@@ skipping 310 matching lines @@
         return 0;
     int targetIndex = mapTargetToIndex(target);
     if (targetIndex < 0 || targetIndex >= static_cast<int>(m_info.size()))
         return 0;
     if (level < 0 || level >= static_cast<GLint>(m_info[targetIndex].size()))
         return 0;
     return &(m_info[targetIndex][level]);
 }
 
 }