Use visitDOMWrapper to preserve WebGL JS object wrappers

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webgl/WebGLVertexArrayObjectBase.h"
 
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
 namespace blink {
@@ skipping 122 matching lines @@
 
     for (size_t i = 0; i < m_arrayBufferList.size(); ++i) {
         if (m_arrayBufferList[i] == buffer) {
             m_arrayBufferList[i]->onDetached(context()->contextGL());
             m_arrayBufferList[i] = nullptr;
         }
     }
     updateAttribBufferBoundStatus();
 }
 
-ScopedPersistent<v8::Array>* WebGLVertexArrayObjectBase::getPersistentCache()
+void WebGLVertexArrayObjectBase::visitChildDOMWrappers(v8::Isolate* isolate, const v8::Persistent<v8::Object>& wrapper)
 {
-    return &m_arrayBufferWrappers;
+    trySetWrapperReferencesInAllWorlds(wrapper, this, isolate);

[Ken Russell (switch to Gerrit), 2016/09/01 21:03:53]

Same comment here.

[Kai Ninomiya, 2016/09/02 18:29:22]

Done.

+    trySetWrapperReferencesInAllWorlds(wrapper, m_boundElementArrayBuffer, isolate);
+    for (size_t i = 0; i < m_arrayBufferList.size(); ++i) {
+        trySetWrapperReferencesInAllWorlds(wrapper, m_arrayBufferList[i], isolate);
+    }
 }
 
 DEFINE_TRACE(WebGLVertexArrayObjectBase)
 {
     visitor->trace(m_boundElementArrayBuffer);
     visitor->trace(m_arrayBufferList);
     WebGLContextObject::trace(visitor);
 }
 
 } // namespace blink