Make protobuf enums canonical for ReadState/WriteState/ConnectState.

Make protobuf enums canonical for ReadState/WriteState/ConnectState.
Delete redundant non-proto ReadState/WriteState/ConnectState enums.
Add cast protogen rule to extension registration deps.
BUG=

Committed: https://crrev.com/d61f0b96fc6068df740118c1fb185a027ddc1c96
Cr-Commit-Position: refs/heads/master@{#296003}

[Kevin M, 2014-09-19 18:36:53]

kmarshall@chromium.org changed reviewers:
+ rockot@chromium.org, wez@chromium.org

[Kevin M, 2014-09-19 18:37:42]

Was CL #576483003. Previous submission failed due to dangling path references
breaking the build. The problem wasn't caught by the trybots :( I verified the
correctness of this CL by cleaning the output directory and building Chrome and
unit tests from scratch. Sorry about the double-review.

[Ken Rockot(use gerrit already), 2014-09-19 22:40:10]

On 2014/09/19 18:37:42, kmarshall wrote:
> Was CL #576483003. Previous submission failed due to dangling path references
> breaking the build. The problem wasn't caught by the trybots :( I verified the
> correctness of this CL by cleaning the output directory and building Chrome
and
> unit tests from scratch. Sorry about the double-review.

lgtm

[Kevin M, 2014-09-19 22:44:01]

The CQ bit was checked by kmarshall@chromium.org

[commit-bot: I haz the power, 2014-09-19 22:45:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/589663002/1

[commit-bot: I haz the power, 2014-09-19 22:50:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-19 22:50:38]

Try jobs failed on following builders:
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/58528)
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Kevin M, 2014-09-19 23:47:52]

The CQ bit was checked by kmarshall@chromium.org

[commit-bot: I haz the power, 2014-09-19 23:48:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/589663002/20001

[Wez, 2014-09-19 23:50:56]

Rubber-stamp LGTM

For future reference, you can re-use the original CL for re-lands w/ minor fixes
by re-opening it, uploading the required fixes, and re-landing. :)

[commit-bot: I haz the power, 2014-09-20 01:50:19]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-20 01:50:20]

Exceeded time limit waiting for builds to trigger.

[Kevin M, 2014-09-22 17:07:36]

The CQ bit was checked by kmarshall@chromium.org

[commit-bot: I haz the power, 2014-09-22 17:09:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/589663002/20001

[commit-bot: I haz the power, 2014-09-22 17:10:39]

Committed patchset #2 (id:20001) as 1374b436d89acae16b35efb4e0ebe368daac48aa

[commit-bot: I haz the power, 2014-09-22 17:11:22]

Patchset 2 (id:??) landed as
https://crrev.com/d61f0b96fc6068df740118c1fb185a027ddc1c96
Cr-Commit-Position: refs/heads/master@{#296003}