Speculative Fix for crash in WebCore::Internals::IsSelectPopupVisible

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 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.
@@ skipping 2202 matching lines @@
 
 bool Internals::isSelectPopupVisible(Node* node)
 {
     ASSERT(node);
     if (!isHTMLSelectElement(*node))
         return false;
 
     HTMLSelectElement& select = toHTMLSelectElement(*node);
 
     RenderObject* renderer = select.renderer();
-    if (!renderer->isMenuList())
+    if (!renderer || !renderer->isMenuList())
         return false;
 
     RenderMenuList* menuList = toRenderMenuList(renderer);
     return menuList->popupIsVisible();
 }
 
 bool Internals::loseSharedGraphicsContext3D()
 {
     OwnPtr<blink::WebGraphicsContext3DProvider> sharedProvider = adoptPtr(blink::Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
     if (!sharedProvider)
@@ skipping 135 matching lines @@
     } else if (type == "none") {
         webtype = blink::ConnectionTypeNone;
     } else {
         exceptionState.throwDOMException(NotFoundError, ExceptionMessages::failedToEnumerate("connection type", type));
         return;
     }
     networkStateNotifier().setWebConnectionTypeForTest(webtype);
 }
 
 } // namespace WebCore