Fix for Skia data race.  This may introduce some performance issues; will watch perf bots carefully.
Fix for Skia data race.  This may introduce some performance issues; will watch perf bots carefully.

BUG=46672
TEST=see perf bits

Review URL: http://codereview.chromium.org/2876001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@50510 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser