Use visitDOMWrapper to preserve WebGL JS object wrappers

third_party/WebKit/Source/bindings/modules/v8/custom/V8WebGL2RenderingContextCustom.cpp

 /*
  * Copyright (C) 2016 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER 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 WebEffectiveConnectionType_h
-#define WebEffectiveConnectionType_h
+#include "bindings/modules/v8/V8WebGL2RenderingContext.h"
+
+#include "modules/webgl/WebGL2RenderingContextBase.h"
+
+using namespace WTF;
 
 namespace blink {
 
-enum class WebEffectiveConnectionType {
-    TypeUnknown,
-    TypeOffline,
-    TypeSlow2G,
-    Type2G,
-    Type3G,
-    Type4G
-};
+void V8WebGL2RenderingContext::visitDOMWrapperExtra(v8::Isolate* isolate, ScriptWrappable* scriptWrappable, const v8::Persistent<v8::Object>& wrapper)
+{
+    WebGL2RenderingContext* impl = scriptWrappable->toImpl<WebGL2RenderingContext>();
+    impl->visitChildDOMWrappers(isolate, wrapper);
+}
 
 } // namespace blink
-
-#endif // WebEffectiveConnectionType_h