Update perf expectations for recent changes.
Update perf expectations for recent changes.

A DamageRects change sped up some dhtml performance
tests.  Other tests require a wider variance to avoid
false alerts.

BUG=none
TEST=tests are green

Review URL: http://codereview.chromium.org/460115

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@33984 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