Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLTexture.h

 /*
  * 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 92 matching lines @@
         }
 
         bool valid;
         GC3Denum internalFormat;
         GC3Dsizei width;
         GC3Dsizei height;
         GC3Denum type;
     };
 
     virtual bool isTexture() const { return true; }
+    virtual const char* typeName() const { return "WebGLTexture"; }
 
     void update();
 
     int mapTargetToIndex(GC3Denum) const;
 
     const LevelInfo* getLevelInfo(GC3Denum target, GC3Dint level) const;
 
     GC3Denum m_target;
 
     GC3Denum m_minFilter;
     GC3Denum m_magFilter;
     GC3Denum m_wrapS;
     GC3Denum m_wrapT;
 
     Vector<Vector<LevelInfo> > m_info;
 
     bool m_isNPOT;
     bool m_isCubeComplete;
     bool m_isComplete;
     bool m_needToUseBlackTexture;
     bool m_isFloatType;
     bool m_isHalfFloatType;
 };
 
 } // namespace WebCore
 
 #endif // WebGLTexture_h