Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLExtension.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 31 matching lines @@
   explicit WebGLExtensionScopedContext(WebGLExtension*);
   ~WebGLExtensionScopedContext();
 
   bool isLost() const { return !m_context; }
   WebGLRenderingContextBase* context() const { return m_context.get(); }
 
  private:
   Member<WebGLRenderingContextBase> m_context;
 };
 
-class WebGLExtension : public GarbageCollectedFinalized<WebGLExtension>,
+class WebGLExtension : public GarbageCollected<WebGLExtension>,
                        public ScriptWrappable {
   WTF_MAKE_NONCOPYABLE(WebGLExtension);
 
  public:
-  virtual ~WebGLExtension();
   virtual WebGLExtensionName name() const = 0;
 
   // Lose this extension. Passing true = force loss. Some extensions
   // like WEBGL_lose_context are not normally lost when the context
   // is lost but must be lost when destroying their WebGLRenderingContextBase.
   virtual void lose(bool) { m_context = nullptr; }
 
   bool isLost() { return !m_context; }
 
   DECLARE_VIRTUAL_TRACE();
@@ skipping 10 matching lines @@
 
  private:
   friend WebGLExtensionScopedContext;
 
   WeakMember<WebGLRenderingContextBase> m_context;
 };
 
 }  // namespace blink
 
 #endif  // WebGLExtension_h