GitLab

This is still the foundation, has no implementation, just plain old html and its structure.

BUG=173, 947
TEST=none

Review URL: http://codereview.chromium.org/155051

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@19918 0039d316-1c4b-4281-b951-d872f2087c98