NNTP: Set the pinned tooltip when we set the pinned state of the DOM.
NNTP: Set the pinned tooltip when we set the pinned state of the DOM.

BUG=16460

TEST=Drag a non pinned thumbnail and drop it on another thumbnail. Then
hover over the unpin button and the tooltip should say unpin/don't keep
on this page.


Review URL: http://codereview.chromium.org/155574

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@20749 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