Convert the traces in the WhitelistedExtension test.
Convert the traces in the WhitelistedExtension test.

The test has been enabled for a long time and does not
currently even appear on the Flakiness dashboard, nor can I
find a failure on the try servers.

The failure mentioned in the bug does not show the traces I
added, so I'm converting the traces to another form, in
case we see flakiness again.

BUG=57694
TEST=Changing a test.

Review URL: http://codereview.chromium.org/5255004

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@67100 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