Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

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

 /*
  * 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 22 matching lines @@
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
 namespace blink {
 
 ANGLEInstancedArrays::ANGLEInstancedArrays(WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
   context->extensionsUtil()->ensureExtensionEnabled(
       "GL_ANGLE_instanced_arrays");
 }
 
-ANGLEInstancedArrays::~ANGLEInstancedArrays() {}
-
 WebGLExtensionName ANGLEInstancedArrays::name() const {
   return ANGLEInstancedArraysName;
 }
 
 ANGLEInstancedArrays* ANGLEInstancedArrays::create(
     WebGLRenderingContextBase* context) {
   return new ANGLEInstancedArrays(context);
 }
 
 bool ANGLEInstancedArrays::supported(WebGLRenderingContextBase* context) {
@@ skipping 32 matching lines @@
 void ANGLEInstancedArrays::vertexAttribDivisorANGLE(GLuint index,
                                                     GLuint divisor) {
   WebGLExtensionScopedContext scoped(this);
   if (scoped.isLost())
     return;
 
   scoped.context()->vertexAttribDivisorANGLE(index, divisor);
 }
 
 }  // namespace blink