Add the client address to the Public Reset packet.

Add the client address to the Public Reset packet.

For future extensibility, encode the fields of QuicPublicResetPacket
as a CryptoHandshakeMessage, which is essentially a QuicTagValueMap.

Move the CryptoHandshakeMessage class to its own files.

Move the QuicTagValueMap type from crypto_protocol.h to
quic_protocol.h.

Merge internal CL: 60963943

Note: net/quic/crypto/crypto_handshake_message.{cc,h} were added
separately in https://codereview.chromium.org/154643006.

R=rch@chromium.org,rtenneti@chromium.org
BUG=none
TEST=net_unittests

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248898

[Ryan Hamilton, 2014-02-05 01:14:25]

lgtm

[wtc, 2014-02-05 01:57:21]

The CQ bit was checked by wtc@chromium.org

[commit-bot: I haz the power, 2014-02-05 03:51:24]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/wtc@chromium.org/147763009/90001

[commit-bot: I haz the power, 2014-02-05 07:23:27]

Change committed as 248898