[chromedriver] Enable a java test and fix binary path like "~/chrome".

The java test is fixed in https://codereview.chromium.org/147083010/

BUG=None
R=craigdh@chromium.org

Review URL: https://codereview.chromium.org/137423013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247796 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247796