Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

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

 /*
  * Copyright (C) 2011 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:
  *
  * 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
@@ skipping 16 matching lines @@
 
 namespace blink {
 
 OESStandardDerivatives::OESStandardDerivatives(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
   context->extensionsUtil()->ensureExtensionEnabled(
       "GL_OES_standard_derivatives");
 }
 
-OESStandardDerivatives::~OESStandardDerivatives() {}
-
 WebGLExtensionName OESStandardDerivatives::name() const {
   return OESStandardDerivativesName;
 }
 
 OESStandardDerivatives* OESStandardDerivatives::create(
     WebGLRenderingContextBase* context) {
   return new OESStandardDerivatives(context);
 }
 
 bool OESStandardDerivatives::supported(WebGLRenderingContextBase* context) {
   return context->extensionsUtil()->supportsExtension(
       "GL_OES_standard_derivatives");
 }
 
 const char* OESStandardDerivatives::extensionName() {
   return "OES_standard_derivatives";
 }
 
 }  // namespace blink