Landing Recent QUIC changes until 6/23/2015 11:54 AM

Landing Recent QUIC changes until 6/23/2015 11:54 AM

(landing all changes that were reviewed).

relnote: QUIC - FEC_PROTECT all streams when FLAGS_quic_send_fec_packet_only_on_fec_alarm
is enabled and when client sends 'FSTR' connection option. 'FSTR' option
is not being sent by chromium yet. It will be enabled by a finch trial.

Moved HasClientSentConnectionOption from QuicSentPacketManager to
QuicConfig.

Merge internal change: 96694756
https://codereview.chromium.org/1208423002/

relnote: Make QUIC test client cache response even on error. (n/a test only)

QuicTestClient::SendSynchronousRequest was returning a response-body
of "", but not correctly cacheing the response.  As a consequence, you
could get a response of "", but if you called response_body() to get
the cached body, you'd get a result of "ok/n" (or whatever the
previous response body was).

This small bug was causing surprises in my upcoming test client
refactor.  Added an expectation to an existing test to prevent
regression.

Merge internal change: 96674829
https://codereview.chromium.org/1209303002/

relnote: QuicTestClient now supports multi-request send. (n/a test only)

This is a very small "refactor" and bug fix in preparation for an
upcoming change for stateless rejects.

The "StreamLimitTest" currently calls SendRequests from the underlying
QuicClient to send multiple requests, when it really should call a
function from the higher-level QuicTestClient.  This slight
inconsistency was complicating a different, larger refactor.

Added support for sending multiple requests to the QuicTestClient.
The function SendRequestsAndWaitForLastResponse() sends a batch of
requests, and then waits for the response from the last request to
return.  It is analagous to the QuicClient::SendRequests() function,
in that the caller should set a "response_listener" to gather the
responses as they return.

Also fixed a tiny bug in the QuicTestClient::OnClose() function so
that it now calls the underlying QuicClient::OnClose() function.
Without this, the response_listener never gets a chance to run.

Merge internal change: 96674661
https://codereview.chromium.org/1208413002/

relnote: Increase max packet size on QUIC MTU probe success.
No functional change yet, hence no feature flag.

Merge internal change: 96614300
https://codereview.chromium.org/1212733002/

relnote: deprecating FLAGS_quic_stop_early_2.

Merge internal change: 96564818
https://codereview.chromium.org/1216573002/

TBR=rch@chromium.org

Review URL: https://codereview.chromium.org/1213693004

Cr-Commit-Position: refs/heads/master@{#336409}