File Manager: Full Page mode

Initial support of full page file manager and task buttons

BUG=
TEST=

Review URL: http://codereview.chromium.org/6869045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81984 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed