[Chromium] Rebaselining overflow-size-change* tests.

Unreviewed. Gardening.

* platform/chromium-mac-lion/fast/regions/overflow-size-change-in-variable-width-regions-expected.png:
* platform/chromium-mac-lion/fast/regions/overflow-size-change-with-stacking-context-expected.png:
* platform/chromium-mac-snowleopard/fast/regions/overflow-size-change-in-variable-width-regions-expected.png:
* platform/chromium-mac-snowleopard/fast/regions/overflow-size-change-with-stacking-context-expected.png:
* platform/chromium-mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.png:
* platform/chromium-mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt: Renamed from LayoutTests/platform/chromium/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt.
* platform/chromium-mac/fast/regions/overflow-size-change-with-stacking-context-expected.png:
* platform/chromium-mac/fast/regions/overflow-size-change-with-stacking-context-expected.txt: Renamed from LayoutTests/platform/chromium/fast/regions/overflow-size-change-with-stacking-context-expected.txt.
* platform/chromium-win/fast/regions/overflow-size-change-in-variable-width-regions-expected.png:
* platform/chromium-win/fast/regions/overflow-size-change-with-stacking-context-expected.png:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140933 268f45cc-cd09-0410-ab3c-d52691b4dbfc