Revert of Fix SPDY error-handling if the connection gets closed just after use.

Revert of Fix SPDY error-handling if the connection gets closed just after use. (https://codereview.chromium.org/200723004/)

Reason for revert:
Linux LSan isn't happy: AddressSanitizer: stack-buffer-overflow

http://build.chromium.org/p/chromium.memory/builders/Linux%20ASan%2BLSan%20Tests%20%281%29/builds/650/steps/net_unittests/logs/GetUploadProgressBeforeInitialization_0

Original issue's description:
> Fix SPDY error-handling if the connection gets closed just after use.
> 
> - Make SpdySession::IsReused() return true if the underlying socket was
>   UNUSED_IDLE. This makes the HttpNetworkTransaction-level retry try a fresh
>   socket in case a preconnected socket was stale.
> 
> - If the SpdySession closes in an event loop iteration between
>   HttpStreamFactoryImplJob::DoCreateStream and OnNewSpdySessionReadyCallback,
>   propogate the error to the request to prevent it from hanging. Do so by
>   creating the originating request's SpdyHttpStream as soon as the SpdySession
>   is created so it can sample SpdySession::IsReused() and advise
>   HttpNetworkTransaction on error.
> 
> - Delay pumping the SpdySession read loop by an event loop iteration. This
>   simplifies some logic and ensures that HttpNetworkTransaction receives a
>   SpdyHttpStream to advise retry logic. This does mean we lose the error code;
>   it now follows the asynchronous case and turns into ERR_CONNECTION_CLOSED in
>   SpdyHttpStream::InitializeStream.
> 
> BUG=352156
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=258647

TBR=rch@chromium.org,davidben@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=352156
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=258657

[vandebo (ex-Chrome), 2014-03-21 20:15:46]

Created Revert of Fix SPDY error-handling if the connection gets closed just
after use.

[commit-bot: I haz the power, 2014-03-21 20:16:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/vandebo@chromium.org/208663003/1

[commit-bot: I haz the power, 2014-03-21 20:17:09]

Change committed as 258657