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It sent the wrong error code for duplicate SYN_REPLY frames. Also,
it didn't trigger an error for data frames sent before SYN_REPLY.

Update tests to match.

Add {Active,Pushed}StreamInfo structs and use them in
{Active,Pushed}StreamMap.

Be defensive when closing expired push streams.

Give the correct name to SpdyHttpStream tests.

BUG=252556
R=rch@chromium.org

Review URL: https://codereview.chromium.org/17004007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207885 0039d316-1c4b-4281-b951-d872f2087c98