Use visitDOMWrapper to preserve WebGL JS object wrappers

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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGLFramebuffer_h
 #define WebGLFramebuffer_h
 
-#include "bindings/core/v8/ScopedPersistent.h"
 #include "modules/webgl/WebGLContextObject.h"
 #include "modules/webgl/WebGLSharedObject.h"
 
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
 namespace blink {
@@ skipping 48 matching lines @@
 
     // Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
     void drawBuffers(const Vector<GLenum>& bufs);
 
     GLenum getDrawBuffer(GLenum);
 
     void readBuffer(const GLenum colorBuffer) { m_readBuffer = colorBuffer; }
 
     GLenum getReadBuffer() const { return m_readBuffer; }
 
-    ScopedPersistent<v8::Array>* getPersistentCache();
+    virtual void visitChildDOMWrappers(v8::Isolate*, const v8::Persistent<v8::Object>&);
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     explicit WebGLFramebuffer(WebGLRenderingContextBase*);
 
     bool hasObject() const override { return m_object != 0; }
     void deleteObjectImpl(gpu::gles2::GLES2Interface*) override;
 
 private:
@@ skipping 14 matching lines @@
 
     AttachmentMap m_attachments;
     bool m_destructionInProgress;
 
     bool m_hasEverBeenBound;
 
     Vector<GLenum> m_drawBuffers;
     Vector<GLenum> m_filteredDrawBuffers;
 
     GLenum m_readBuffer;
-
-    ScopedPersistent<v8::Array> m_attachmentWrappers;
 };
 
 } // namespace blink
 
 #endif // WebGLFramebuffer_h