Fixes to webdriver.
Patch by zachconrad@

R=gram@google.com

Review URL: https://codereview.chromium.org//16758009

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23889 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed