ImageSource::orientationAtIndex() always calls CGImageSourceCopyPropertiesAtIndex. However in cases where the call is made from frameSizeAtIndex() we already have image properties. We can refactor the code to avoid a second call to this function under frameSizeAtIndex()
Created attachment 167463 [details] Patch
<rdar://problem/12438025>
Committed r130591: <http://trac.webkit.org/changeset/130591>