GitLab

Add chromeish button style
Fix dialog gradient and transitions
Fix harness file creation
Fix task button rendering
Make list header gradient not leak outside of list
Show checkmark even when only a single item is selected (multi-select mode only).
Add a delay to the mock tasks callback to better simulate the real world.

BUG=chromium-os:17028, chromium-os:19373, chromium-os:19693
TEST=manual testing

Review URL: http://codereview.chromium.org/7764011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98701 0039d316-1c4b-4281-b951-d872f2087c98