Update a few more chromium compositor baselines.

* platform/chromium-linux/compositing/iframes/become-overlapped-iframe-expected.txt: Added.
* platform/chromium-mac-lion/platform/chromium/virtual/softwarecompositing/geometry/layer-due-to-layer-children-deep-expected.png:
* platform/chromium-mac-snowleopard/platform/chromium/virtual/softwarecompositing/geometry/layer-due-to-layer-children-deep-expected.png:
* platform/chromium-mac/platform/chromium/virtual/softwarecompositing/geometry/layer-due-to-layer-children-deep-expected.png:
* platform/chromium-win/platform/chromium/virtual/softwarecompositing/geometry/layer-due-to-layer-children-deep-expected.png:
* platform/chromium/compositing/geometry/limit-layer-bounds-overflow-root-expected.txt: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146850 268f45cc-cd09-0410-ab3c-d52691b4dbfc