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

CID=1602
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/223026

git-svn-id: http://src.chromium.org/svn/trunk/src@27135 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5cf7363b35bf384782ffc5f1378c3909dcec1e5f
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