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

CID=1608
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/222024

git-svn-id: http://src.chromium.org/svn/trunk/src@27136 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 400f935936024e051f469bad9d8fe39516b321d1
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