Bookmark manager: Make Enter do rename on Mac.
Bookmark manager: Make Enter do rename on Mac.

BUG=58325
TEST=Open bookmark manager. Select an item and press Enter. This should start a rename/edit of the item.

Review URL: http://codereview.chromium.org/3787008

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@62984 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