[wrapper-tracing] WebGL and friends: Add write barriers

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

Index: third_party/WebKit/Source/modules/webgl/WebGLVertexArrayObjectBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLVertexArrayObjectBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLVertexArrayObjectBase.cpp
index 09a23f0821d73aed880d2746210505353e6575ee..94c2779a91bcb88efaf0e7db3c4a255cb5aee3a0 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLVertexArrayObjectBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLVertexArrayObjectBase.cpp
@@ -4,6 +4,7 @@
 
 #include "modules/webgl/WebGLVertexArrayObjectBase.h"
 
+#include "bindings/core/v8/ScriptWrappableVisitor.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
@@ -80,6 +81,7 @@ void WebGLVertexArrayObjectBase::setElementArrayBuffer(WebGLBuffer* buffer) {
   if (m_boundElementArrayBuffer)
     m_boundElementArrayBuffer->onDetached(context()->contextGL());
   m_boundElementArrayBuffer = buffer;
+  ScriptWrappableVisitor::writeBarrier(this, m_boundElementArrayBuffer);
 }
 
 WebGLBuffer* WebGLVertexArrayObjectBase::getArrayBufferForAttrib(size_t index) {
@@ -95,6 +97,7 @@ void WebGLVertexArrayObjectBase::setArrayBufferForAttrib(GLuint index,
     m_arrayBufferList[index]->onDetached(context()->contextGL());
 
   m_arrayBufferList[index] = buffer;
+  ScriptWrappableVisitor::writeBarrier(this, m_arrayBufferList[index]);
   updateAttribBufferBoundStatus();
 }