[wrapper-tracing] Fix WebGL extension and attachment handling

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

 /*
  * 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 27 matching lines @@
 
 namespace blink {
 
 class WebGLRenderbuffer;
 class WebGLTexture;
 
 class WebGLFramebuffer final : public WebGLContextObject {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
-  class WebGLAttachment : public GarbageCollected<WebGLAttachment> {
+  class WebGLAttachment : public GarbageCollected<WebGLAttachment>,
+                          public TraceWrapperBase {
    public:
     virtual WebGLSharedObject* object() const = 0;
     virtual bool isSharedObject(WebGLSharedObject*) const = 0;
     virtual bool valid() const = 0;
     virtual void onDetached(gpu::gles2::GLES2Interface*) = 0;
     virtual void attach(gpu::gles2::GLES2Interface*,
                         GLenum target,
                         GLenum attachment) = 0;
     virtual void unattach(gpu::gles2::GLES2Interface*,
                           GLenum target,
@@ skipping 94 matching lines @@
 
   Vector<GLenum> m_drawBuffers;
   Vector<GLenum> m_filteredDrawBuffers;
 
   GLenum m_readBuffer;
 };
 
 }  // namespace blink
 
 #endif  // WebGLFramebuffer_h