Land recent SPDY changes

Add settings IDs to SpdyConstants.

Refactor only, no behavioral change.

This lands server change 63167890 by hkhalil.
https://codereview.chromium.org/202383002/


Syntactic-only changes to use protocol_version() over spdy_version_ in SpdyFramer.

Also use the lowest possible enumeration value when doing comparisons,
which makes deprecating older versions easier.

This lands server change 63165647 by hkhalil.
https://codereview.chromium.org/202113002/


Add some break statements in spdy_protocol for clarity.

This lands server change 63158241 by hkhalil.
https://codereview.chromium.org/198213007/


Minor logging change for catching development errors during testing.

This lands server change 63102059 by hkhalil.
https://codereview.chromium.org/201943003/


Introduce new SpdyConstants class

Used for translating between code constants and on-the-wire
representations (which differ from version to version). Currently
only handles SpdyFrameType constants.

This lands server change 62928184 by hkhalil.
https://codereview.chromium.org/202073003/


Fix SpdyFramerTest.ProcessDataFrameWithPadding so it no longer tells SpdyFramer to read past the end of a buffer.

This lands server change 62728542 by elving.
https://codereview.chromium.org/197863004/


Added OverwriteFlags method to SpdyFrameBuilder.

If we find the after-compression payload of a HEADERS or PUSH_PROMISE is too
long, we can go back and turn off the END_HEADERS or END_PUSH_PROMISE flag.

Will be used in a follow-up CL to automatically serialize header blocks across
CONTINUATION frames as needed.

This lands server change 62682641 by mlavan.
https://codereview.chromium.org/202063002/


Update SPDY4 length field to exclude frame prefix length.

Does not enforce the new 16KB max frame size.

This lands server change 62559133 by mlavan.
https://codereview.chromium.org/202033002/


Implement padding for SPDY4/HTTP2 DATA frames.

Padding is correctly interpreted, but not emitted.

This lands server change 62555297 by raullenchai.
https://codereview.chromium.org/199843005/

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260477

[Ryan Hamilton, 2014-03-18 16:15:46]

LGTM, as I have reviewed all the individual changes.

[Johnny, 2014-03-27 22:27:31]

The CQ bit was checked by jgraettinger@chromium.org

[commit-bot: I haz the power, 2014-03-27 22:29:21]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jgraettinger@chromium.org/202403002/13...

[Johnny, 2014-03-28 14:55:41]

The CQ bit was unchecked by jgraettinger@chromium.org

[Johnny, 2014-03-28 14:55:49]

The CQ bit was checked by jgraettinger@chromium.org

[cmp, 2014-03-30 16:52:49]

The CQ bit was unchecked by cmp@chromium.org

[cmp, 2014-03-30 16:55:19]

The CQ bit was checked by cmp@chromium.org

[commit-bot: I haz the power, 2014-03-30 16:55:21]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jgraettinger@chromium.org/202403002/13...

[commit-bot: I haz the power, 2014-03-30 17:48:21]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-30 17:48:22]

Retried try job too often on win_rel for step(s) net_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[Johnny, 2014-03-30 22:54:22]

The CQ bit was checked by jgraettinger@chromium.org

[commit-bot: I haz the power, 2014-03-30 22:54:23]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jgraettinger@chromium.org/202403002/13...

[commit-bot: I haz the power, 2014-03-31 00:49:05]

Change committed as 260477