FYI: Adds V8PrivateProperty::getOrUndefined().

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

 /*
  * 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 129 matching lines @@
     case GL_FRAGMENT_SHADER:
         if (m_fragmentShader != shader)
             return false;
         m_fragmentShader = nullptr;
         return true;
     default:
         return false;
     }
 }
 
-ScopedPersistent<v8::Array>* WebGLProgram::getPersistentCache()
-{
-    return &m_shaderWrappers;
-}
-
 void WebGLProgram::cacheInfoIfNeeded(WebGLRenderingContextBase* context)
 {
     if (m_infoValid)
         return;
     if (!m_object)
         return;
     gpu::gles2::GLES2Interface* gl = context->contextGL();
     m_linkStatus = 0;
     gl->GetProgramiv(m_object, GL_LINK_STATUS, &m_linkStatus);
     m_infoValid = true;
 }
 
 DEFINE_TRACE(WebGLProgram)
 {
     visitor->trace(m_vertexShader);
     visitor->trace(m_fragmentShader);
     WebGLSharedPlatform3DObject::trace(visitor);
 }
 
 } // namespace blink