Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

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

 /*
  * Copyright (C) 2009 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 133 matching lines @@
 
 WebGLRenderingContext::WebGLRenderingContext(
     OffscreenCanvas* passedOffscreenCanvas,
     std::unique_ptr<WebGraphicsContext3DProvider> contextProvider,
     const CanvasContextCreationAttributes& requestedAttributes)
     : WebGLRenderingContextBase(passedOffscreenCanvas,
                                 std::move(contextProvider),
                                 requestedAttributes,
                                 1) {}
 
-WebGLRenderingContext::~WebGLRenderingContext() {}
-
 void WebGLRenderingContext::setCanvasGetContextResult(
     RenderingContext& result) {
   result.setWebGLRenderingContext(this);
 }
 
 void WebGLRenderingContext::setOffscreenCanvasGetContextResult(
     OffscreenRenderingContext& result) {
   result.setWebGLRenderingContext(this);
 }
 
@@ skipping 74 matching lines @@
   visitor->trace(m_webglDepthTexture);
   WebGLRenderingContextBase::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(WebGLRenderingContext) {
   // Extensions are managed base WebGLRenderingContextBase.
   WebGLRenderingContextBase::traceWrappers(visitor);
 }
 
 }  // namespace blink