Rollback of merge internal change: 87346681.

Rollback of merge internal change: 87346681.

Chromium CL reviewed:
  https://codereview.chromium.org/968923005/

Chomium committed CL: "Land Recent QUIC Changes until 03/02/2015".
  https://codereview.chromium.org/968233004/

This CL was in M43 bit not in M42. It impacted last week's Dev release
and all Canary released after 03/03/2015.

*** Original change description ***

Remove TCP and BBR's max congestion window.  No practical change,
because Chrome's receive window is the limiting factor.

Adds kMaxReportedCwnd and kMaxReorderingForRtt as constants to replace
the max CWND in classes that used to rely on max CWND.

***

Merge internal change: 88545044

R=rch@chromium.org

[Ryan Hamilton, 2015-03-16 03:17:34]

lgtm