Roll GRIT from r152 to r155

Changes:
- r153 Edited wiki page GritUsersGuide through web user interface.
- r154 Edited wiki page GritUsersGuide through web user interface.
- r155 Start to implicitly include \n in rc_header_format.

BUG=None
NOTRY=true

Review URL: https://codereview.chromium.org/184223005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254616 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254617 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254617