Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/ANGLEInstancedArrays.h

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 class WebGLRenderingContextBase;
 
 class ANGLEInstancedArrays final : public WebGLExtension {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static ANGLEInstancedArrays* create(WebGLRenderingContextBase*);
   static bool supported(WebGLRenderingContextBase*);
   static const char* extensionName();
 
-  ~ANGLEInstancedArrays() override;
   WebGLExtensionName name() const override;
 
   void drawArraysInstancedANGLE(GLenum mode,
                                 GLint first,
                                 GLsizei count,
                                 GLsizei primcount);
   void drawElementsInstancedANGLE(GLenum mode,
                                   GLsizei count,
                                   GLenum type,
                                   long long offset,
                                   GLsizei primcount);
   void vertexAttribDivisorANGLE(GLuint index, GLuint divisor);
 
  private:
   explicit ANGLEInstancedArrays(WebGLRenderingContextBase*);
 };
 
 }  // namespace blink
 
 #endif  // ANGLEInstancedArrays_h