Adds a CompareSpdyHeaderBlocks method, rather than relying on operator==.

Adds a CompareSpdyHeaderBlocks method, rather than relying on operator==.
Soon SpdyHeaderBlock will become a LinkedHashMap which does not have
operator== defined, and it doesn't look likely that it will gain such an
implementation (if cl/98825772 does get submitted, I'll revert this CL).

No behavior change.

relnote: n/a (test only)

Merge internal change: 99406076

R=rch@chromium.org

Committed: https://crrev.com/c88daa5c70a8be3eae0704f15491e243fd49ce06
Cr-Commit-Position: refs/heads/master@{#342397}

[Ryan Hamilton, 2015-08-07 18:37:26]

This doesn't appear to actually add CompareSpdyHeaderBlocks, does it? I just bnc
merged that part in net/spdy already?

[Ryan Hamilton, 2015-08-07 18:37:33]

lgtm

[ramant (doing other things), 2015-08-07 18:40:42]

On 2015/08/07 18:37:26, Ryan Hamilton wrote:
> This doesn't appear to actually add CompareSpdyHeaderBlocks, does it? I just
bnc
> merged that part in net/spdy already?

Hi Ryan,
  It doesn't add. Was waiting for bnc@ to land his CL that adds
CompareSpdyHeaderBlocks.
  He checked it in yesterday (https://codereview.chromium.org/1273743002/).

Thanks.

[ramant (doing other things), 2015-08-07 18:40:46]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-08-07 18:41:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1281763002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1281763002/1

[commit-bot: I haz the power, 2015-08-07 18:48:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-07 18:48:46]

Patchset 1 (id:??) landed as
https://crrev.com/c88daa5c70a8be3eae0704f15491e243fd49ce06
Cr-Commit-Position: refs/heads/master@{#342397}