Policy header now includes the policy_token.

BUG=326799

Review URL: https://codereview.chromium.org/151183005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249211 0039d316-1c4b-4281-b951-d872f2087c98
Stops crashes on click on notification.

Some notification delegate specifies null callbacks but calling
them is illegal.

This CL is intentionally small for simplifying merge.
I'll add tests in following CLs.

BUG=336650
R=dewittj@chromium.org

Review URL: https://codereview.chromium.org/151763003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249213 0039d316-1c4b-4281-b951-d872f2087c98
Remove most prerender https tests.

They were added to test FINAL_STATUS_HTTPS in various cases, but now are just
variants of existing tests. Remove them. We happily prerender HTTPS pages these
days.

Leave one around, but adjust the comment.

BUG=none

Review URL: https://codereview.chromium.org/154743005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249215 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249215