Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webgl/WebGLCompressedTextureASTC.h"
 
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
 namespace blink {
 
@@ skipping 26 matching lines @@
     /* GL_COMPRESSED_RGBA_ASTC(0x93B0 ~ 0x93BD) */
     context->addCompressedTextureFormat(
         WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].CompressType);
     /* GL_COMPRESSED_SRGB8_ALPHA8_ASTC(0x93D0 ~ 0x93DD) */
     context->addCompressedTextureFormat(
         WebGLCompressedTextureASTC::kBlockSizeCompressASTC[i].CompressType +
         kAlphaFormatGap);
   }
 }
 
-WebGLCompressedTextureASTC::~WebGLCompressedTextureASTC() {}
-
 WebGLExtensionName WebGLCompressedTextureASTC::name() const {
   return WebGLCompressedTextureASTCName;
 }
 
 WebGLCompressedTextureASTC* WebGLCompressedTextureASTC::create(
     WebGLRenderingContextBase* context) {
   return new WebGLCompressedTextureASTC(context);
 }
 
 bool WebGLCompressedTextureASTC::supported(WebGLRenderingContextBase* context) {
   Extensions3DUtil* extensionsUtil = context->extensionsUtil();
   return extensionsUtil->supportsExtension(
       "GL_KHR_texture_compression_astc_ldr");
 }
 
 const char* WebGLCompressedTextureASTC::extensionName() {
   // TODO(cyzero.kim): implement extension for
   // GL_KHR_texture_compression_astc_hdr.
   return "WEBGL_compressed_texture_astc";
 }
 
 }  // namespace blink