Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLLoseContext.h

 /*
  * Copyright (C) 2010 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 22 matching lines @@
 class WebGLRenderingContextBase;
 
 class WebGLLoseContext final : public WebGLExtension {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static WebGLLoseContext* create(WebGLRenderingContextBase*);
   static bool supported(WebGLRenderingContextBase*);
   static const char* extensionName();
 
-  ~WebGLLoseContext() override;
   WebGLExtensionName name() const override;
   void lose(bool) override;
 
   void loseContext();
   void restoreContext();
 
  private:
   explicit WebGLLoseContext(WebGLRenderingContextBase*);
 };
 
 }  // namespace blink
 
 #endif  // WebGLLoseContext_h