entd: require a per-entd-invocation session id in every request
Change-Id: Ic63af59fa1371a0ac4ea9f1576acdab79216afb1
BUG=chromium-os:5813
TEST=
old extension / new entd
1) open extension options
2) loading fails with a message about entd not starting, logs indicate failure
new extension / old entd
1) open extension options
2) works as expected since all old headers still are sent and new one is
ignored
new extension / new entd
1) open extension options
2) works as expected - session id is sent in every request as expected by entd
Review URL: http://codereview.chromium.org/6874035
5 files changed
