Coverity: Initialize statement_cache_ in the constructor.
Coverity: Initialize statement_cache_ in the constructor.

CID=5040
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/225013

git-svn-id: http://src.chromium.org/svn/trunk/src@26954 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 39da2dcc532c51a914812ba3a0ced2147d01b970
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser