Make sure that gc is exposed in the test_shell
Make sure that gc is exposed in the test_shell

The change in r63863 added the option of changing the V8 JavaScript flags while running tests. However the --expose-gc flag needs to be set before V8 is initialized to the gc object to be available.

BUG=60864
Review URL: http://codereview.chromium.org/4174004

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@64056 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