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: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@46302 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser