GitLab

Not the final UI yet.
Additional improvements:
- file name is selected in save-as dialog at start;
- new folder moved to context menu, button deleted.

BUG=chromium-os:20168,chromium-os:22106,chromium-os:22105,chromium-os:22032,chromium-os:20547,chromium-os:20549
TEST=Manual

Review URL: http://codereview.chromium.org/8554003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113152 0039d316-1c4b-4281-b951-d872f2087c98