Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureATC.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:
  *
  * 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 19 matching lines @@
 WebGLCompressedTextureATC::WebGLCompressedTextureATC(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
   context->addCompressedTextureFormat(GC3D_COMPRESSED_ATC_RGB_AMD);
   context->addCompressedTextureFormat(
       GC3D_COMPRESSED_ATC_RGBA_EXPLICIT_ALPHA_AMD);
   context->addCompressedTextureFormat(
       GC3D_COMPRESSED_ATC_RGBA_INTERPOLATED_ALPHA_AMD);
 }
 
-WebGLCompressedTextureATC::~WebGLCompressedTextureATC() {}
-
 WebGLExtensionName WebGLCompressedTextureATC::name() const {
   return WebGLCompressedTextureATCName;
 }
 
 WebGLCompressedTextureATC* WebGLCompressedTextureATC::create(
     WebGLRenderingContextBase* context) {
   return new WebGLCompressedTextureATC(context);
 }
 
 bool WebGLCompressedTextureATC::supported(WebGLRenderingContextBase* context) {
   return context->extensionsUtil()->supportsExtension(
       "GL_AMD_compressed_ATC_texture");
 }
 
 const char* WebGLCompressedTextureATC::extensionName() {
   return "WEBGL_compressed_texture_atc";
 }
 
 }  // namespace blink