Revert of Convert SpdyNetworkTransactionTest to SequencedSocketData.

Revert of Convert SpdyNetworkTransactionTest to SequencedSocketData. (patchset #6 id:120001 of https://codereview.chromium.org/1114213005/)

Reason for revert:
Stop 2 on the revert train.

Next stop, fixed net_unittests on iOS Simulator (dbg) (iPhone 5 ios 8.1)?

https://build.chromium.org/p/chromium.mac/builders/iOS_Simulator_(dbg)

Original issue's description:
> Convert SpdyNetworkTransactionTest to SequencedSocketData.
>
> Reduces runtime to 11 seconds from 59 seconds on my linux workstation.
> There are still a number of tests which have not been unconverted because they make use of "CompleteRead" semantics which I still need to implement in SequencedSocketData.
>
> BUG=332112
>
> Committed: https://crrev.com/73e1742f4729161d16f70cbdad9d4c1c1836be52
> Cr-Commit-Position: refs/heads/master@{#328171}

TBR=rtenneti@chromium.org,rch@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=332112
Committed: https://crrev.com/ba88353a45b46f2ea4383d4a9fee258156a37571
Cr-Commit-Position: refs/heads/master@{#328269}

[Dan Beam, 2015-05-05 03:36:17]

Created Revert of Convert SpdyNetworkTransactionTest to SequencedSocketData.

[commit-bot: I haz the power, 2015-05-05 03:36:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1126763002/1

[commit-bot: I haz the power, 2015-05-05 03:37:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-05 03:38:57]

Patchset 1 (id:??) landed as
https://crrev.com/ba88353a45b46f2ea4383d4a9fee258156a37571
Cr-Commit-Position: refs/heads/master@{#328269}