Fix recently added FormField constructors that I missed in the last commit.
Fix recently added FormField constructors that I missed in the last commit.

TBR=zork
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/598047

git-svn-id: http://src.chromium.org/svn/trunk/src@38718 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 44000b73340c6d3ccf713c8141aa3a89ff9adbb1
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