See http://code.google.com/p/chromium/issues/detail?id=36021 .
Created attachment 49051 [details] patch v1 Also cleans up two places I noticed when sanity-checking other uses of cachedImage.
Attachment 49051 [details] did not build on qt: Build output: http://webkit-commit-queue.appspot.com/results/289014
Created attachment 49053 [details] patch v2 Fix copy-and-paste error
Fixed in r55029.