Remove git.js dart wrapper of git.
Remove js files of git.
Remove git.js references and tests.
remove refence to deleted test.
Merge pull request #820 from dart-lang/remove_js_git

Remove js git
set styling when spark-button is focused
end of line
Merge pull request #847 from sunglim/btn_focus

Set outline styling when spark-button is focused.
File search box in the toolbar