Use SequencedSocketData in HttpStreamParserTests.

Use SequencedSocketData in HttpStreamParserTests.

SequencedSocketData is a bit cleaner and easier to use than the
alternatives, which we may want to get rid of, long term.

HttpStreamParser.AsyncChunkAndAsyncSocketWithMultipleChunks did rely on
DeterministicSocketData's behavior to get in a state where the previous
chunked upload body write was pending when data was appended to the
chunked upload data stream, but the updated test uses a new method to
ensure that happens.

BUG=492696
Committed: https://crrev.com/f22be0eee8f8fd21aba8c305da14b61bf137023d
Cr-Commit-Position: refs/heads/master@{#333054}

[mmenke, 2015-06-04 20:02:37]

mmenke@chromium.org changed reviewers:
+ rch@chromium.org

[mmenke, 2015-06-04 20:02:37]

Ryan:  Mind reviewing?  There isn't really anyone obvious to send this to.

The only test that seems to have a real reason for mucking with pausing
DeterministicSocketData is AsyncChunkAndAsyncSocketWithMultipleChunks, and I
changed it so it still reaches the desired state, but for the second and third
chunks, instead of the first and second.

[Ryan Hamilton, 2015-06-04 22:58:49]

lgtm

SWEEEEEEEEEEEEET!

[mmenke, 2015-06-05 15:08:36]

The CQ bit was checked by mmenke@chromium.org

[commit-bot: I haz the power, 2015-06-05 15:08:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1166693004/1

[commit-bot: I haz the power, 2015-06-05 15:39:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-05 15:40:02]

Patchset 1 (id:??) landed as
https://crrev.com/f22be0eee8f8fd21aba8c305da14b61bf137023d
Cr-Commit-Position: refs/heads/master@{#333054}