PPB_Flash.Navigate(): Disallow certain HTTP request headers.

With this CL, PPB_Flash.Navigate() fails the operation with
PP_ERROR_NOACCESS if the request headers contain non-simple headers.

BUG=332023
TEST=None

Review URL: https://codereview.chromium.org/136393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249114 0039d316-1c4b-4281-b951-d872f2087c98
Spdy: Send a RST_STREAM when expiring unclaimed push streams.

Because unclaimed streams do not send flow control window updates, silently expiring an unclaimed large stream may leave it indefinitely stalled on the server, consuming resources.

Also switch related test to use deterministic socket data, to enable
unittest verification that a reset was sent.

BUG=272484
R=rch@chromium.org

Review URL: https://codereview.chromium.org/151603002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249116 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249116