Change text of header from 'action' to 'behavior' as per latest webui settings mocks.
Change text of header from 'action' to 'behavior' as per
latest webui settings mocks.

this affects the column header in the content settings exceptions tables.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6656008

git-svn-id: http://src.chromium.org/svn/trunk/src@78066 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 76c21b63302b096a484a6eb285209a6a9662d1f5
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