GTK: make browser action container behave better in RTL.
GTK: make browser action container behave better in RTL.

a) fix gripper resize
b) fix browser action drag movement

BUG=42697
TEST=LANG=he_IL chrome

Review URL: http://codereview.chromium.org/1789005

git-svn-id: http://src.chromium.org/svn/trunk/src@46302 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 361e2eb14e80f7256555c9130f244a481f205772
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