Landing a patch (http://codereview.chromium.org/249054) from an external...

Landing a patch (http://codereview.chromium.org/249054) from an external contributor (Thiago Farina). Description from original changelist:

Add ellipses to |Add| and |Edit| buttons of Search engine manager(keyword view), since they opens another window and 
does not, for example, add or edit the selected item. 

BUG=16380
TEST=Open the search engine manager and see if the |Add| and the |Edit| button has the "..." in the end. 

Review URL: http://codereview.chromium.org/257053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28054 0039d316-1c4b-4281-b951-d872f2087c98