Enable string impl caching for test shell to improve test coverage.
Enable string impl caching for test shell to improve test coverage.

Patch by Anton Muhin
R=darin
BUG=none
TEST=none



git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@22156 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