Adding const ref instead of passing by value.
Adding const ref instead of passing by value.

BUG=None
TEST=None
CID=12224

Review URL: http://codereview.chromium.org/3005058

git-svn-id: http://src.chromium.org/svn/trunk/src@55130 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 76c8c67b828e23e756781dea5b550f2554cbacd5
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