Throttle Socket watcher RTT notifications from QUIC

Throttle Socket watcher RTT notifications from QUIC

A QUIC connection can provide at most one RTT notification per second.
This CL also refactors the code a little bit:
(1) Moves the throttling logic from TCP Socket Posix to a common place:
SocketWatcher, where it is used by both QUIC and TCP
(2) Makes it possible to configure the throttling delay using field
trial params.

BUG=692119
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_cronet_tester

Review-Url: https://codereview.chromium.org/2690113004
Cr-Commit-Position: refs/heads/master@{#450967}
(cherry picked from commit 180587c15a36861cdaaceec045619026e55fe8c5)

Review-Url: https://codereview.chromium.org/2705273002 .
Cr-Commit-Position: refs/branch-heads/2987@{#609}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/a7161971f69be0c7f27b1756a4ccfbd9896a98cc

[tbansal1, 2017-02-21 17:43:10]

Description was changed from

==========
Throttle Socket watcher RTT notifications from QUIC

A QUIC connection can provide at most one RTT notification per second.
This CL also refactors the code a little bit:
(1) Moves the throttling logic from TCP Socket Posix to a common place:
SocketWatcher, where it is used by both QUIC and TCP
(2) Makes it possible to configure the throttling delay using field
trial params.

BUG=692119
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_cronet_tester

Review-Url: https://codereview.chromium.org/2690113004
Cr-Commit-Position: refs/heads/master@{#450967}
(cherry picked from commit 180587c15a36861cdaaceec045619026e55fe8c5)
==========

to

==========
Throttle Socket watcher RTT notifications from QUIC

A QUIC connection can provide at most one RTT notification per second.
This CL also refactors the code a little bit:
(1) Moves the throttling logic from TCP Socket Posix to a common place:
SocketWatcher, where it is used by both QUIC and TCP
(2) Makes it possible to configure the throttling delay using field
trial params.

BUG=692119
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_cronet_tester

Review-Url: https://codereview.chromium.org/2690113004
Cr-Commit-Position: refs/heads/master@{#450967}
(cherry picked from commit 180587c15a36861cdaaceec045619026e55fe8c5)

Review-Url: https://codereview.chromium.org/2705273002 .
Cr-Commit-Position: refs/branch-heads/2987@{#609}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/a7161971f69be0c7f27b1756a4cc...
==========

[tbansal1, 2017-02-21 17:43:11]

Committed patchset #1 (id:1) manually as
a7161971f69be0c7f27b1756a4ccfbd9896a98cc.