Prevent QuicSession from directly accessing streams' flow controller.

This change provides the following advantages:
1. QuicSession is no longer able to go cross QuicStream to modify its flow controller, and is limited on what it can do with stream's flow controller.
2. QuicStream::IsFlowControlBlocked() can be potentially transitioned to a stream state.

This CL also removes some tests in quic_spdy_session_test that are redundant with quic_session_test.

No behavior change. not protected.

PiperOrigin-RevId: 325899044
Change-Id: I1b676da2736507aec0a4438afdbc596ca274ed13
13 files changed
tree: 6e3512d47bf703d902a038296c35194a56b7a28c
  4. common/
  5. epoll_server/
  6. http2/
  7. quic/
  8. spdy/


QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects.