Assume FrameView::m_frame is never NULL

Source/core/plugins/IFrameShimSupport.cpp

 /*
  * Copyright (C) 2011 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 125 matching lines @@
 
     const HashSet<RefPtr<Widget> >* children = parentFrameView->children();
     for (HashSet<RefPtr<Widget> >::const_iterator it = children->begin(); it != children->end(); ++it) {
         // We only care about FrameView's because iframes show up as FrameViews.
         if (!(*it)->isFrameView())
             continue;
 
         const FrameView* frameView = toFrameView((*it).get());
         // Check to make sure we can get both the element and the RenderObject
         // for this FrameView, if we can't just move on to the next object.
-        if (!frameView->frame() || !frameView->frame()->ownerElement()
-            || !frameView->frame()->ownerElement()->renderer())
+        if (!frameView->frame()->ownerElement() || !frameView->frame()->ownerElement()->renderer())
             continue;
 
         HTMLElement* element = frameView->frame()->ownerElement();
         RenderObject* iframeRenderer = element->renderer();
 
         if (element->hasTagName(HTMLNames::iframeTag)
             && iframeRenderer->absoluteBoundingBoxRectIgnoringTransforms().intersects(frameRect)
             && (!iframeRenderer->style() || iframeRenderer->style()->visibility() == VISIBLE)) {
             getObjectStack(iframeRenderer, &iframeZstack);
             if (iframeIsAbovePlugin(iframeZstack, pluginZstack)) {
                 IntPoint point = roundedIntPoint(iframeRenderer->localToAbsolute());
                 RenderBox* rbox = toRenderBox(iframeRenderer);
                 IntSize size(rbox->width(), rbox->height());
                 occlusions.append(IntRect(point, size));
             }
         }
     }
 }
 
 } // namespace WebCore