Return Frame&, not Frame* from RenderView::frame()

Source/core/plugins/IFrameShimSupport.cpp

Index: Source/core/plugins/IFrameShimSupport.cpp
diff --git a/Source/core/plugins/IFrameShimSupport.cpp b/Source/core/plugins/IFrameShimSupport.cpp
index 95bccd1c1c982c32b4f6e59ba23432a909537260..4d7af1e550b703ab860d9ae9db2f0a4c64f1499f 100644
--- a/Source/core/plugins/IFrameShimSupport.cpp
+++ b/Source/core/plugins/IFrameShimSupport.cpp
@@ -143,10 +143,10 @@ void getPluginOcclusions(Element* element, Widget* parentWidget, const IntRect&
         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()->ownerElement() || !frameView->frame()->ownerElement()->renderer())
+        HTMLElement* element = frameView->frame().ownerElement();
+        if (!element || element->renderer())
             continue;
 
-        HTMLElement* element = frameView->frame()->ownerElement();
         RenderObject* iframeRenderer = element->renderer();
 
         if (element->hasTagName(HTMLNames::iframeTag)