Disable all FileWriter worker tests as r75514 causes them to fail in thread assertions.
Disable all FileWriter worker tests as r75514 causes them to fail in thread assertions.

BUG=75548
TEST=none
TBR=kinuko@chromium.org

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@77598 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