NTP: Add work around for recent changes to HTML5 DnD behavior.
NTP: Add work around for recent changes to HTML5 DnD behavior.

BUG=33657
TEST=Drag and drop thumbnails on the NTP to reorder them.

Review URL: http://codereview.chromium.org/558055

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@37647 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