Fix off-by-one error in counter array sizing in BlimpStats.

Fix off-by-one error in counter array sizing in BlimpStats.

BlimpStats' Atomic32[] array was missing an element thanks to the
misapplication of a zero-indexed enum value. This lead to memory
corruption when certain counter values were incremented. In this case,
the zlib global flag "x86_cpu_enable_simd" was corrupted, leading zlib's
deflate() function down invalid SSE SIMD codepaths.

Also restored compression by reverting cl/2248943003.

BUG=637376
R=lethalantidote@chromium.org,wez@chromium.org

Committed: https://crrev.com/e4507bfea675457b628f51da133224f7b7f62ab3
Cr-Commit-Position: refs/heads/master@{#412380}

[Kevin M, 2016-08-16 22:44:19]

The CQ bit was checked by kmarshall@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-16 22:44:38]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[CJ, 2016-08-16 22:54:26]

lgtm

[Kevin M, 2016-08-16 22:58:23]

The CQ bit was checked by kmarshall@chromium.org

[commit-bot: I haz the power, 2016-08-16 22:58:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-16 23:47:38]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-16 23:50:55]

Description was changed from

==========
Fix off-by-one error in counter array sizing in BlimpStats.

BlimpStats' Atomic32[] array was missing an element thanks to the
misapplication of a zero-indexed enum value. This lead to memory
corruption when certain counter values were incremented. In this case,
the zlib global flag "x86_cpu_enable_simd" was corrupted, leading zlib's
deflate() function down invalid SSE SIMD codepaths.

Also restored compression by reverting cl/2248943003.

BUG=637376
R=lethalantidote@chromium.org,wez@chromium.org
==========

to

==========
Fix off-by-one error in counter array sizing in BlimpStats.

BlimpStats' Atomic32[] array was missing an element thanks to the
misapplication of a zero-indexed enum value. This lead to memory
corruption when certain counter values were incremented. In this case,
the zlib global flag "x86_cpu_enable_simd" was corrupted, leading zlib's
deflate() function down invalid SSE SIMD codepaths.

Also restored compression by reverting cl/2248943003.

BUG=637376
R=lethalantidote@chromium.org,wez@chromium.org

Committed: https://crrev.com/e4507bfea675457b628f51da133224f7b7f62ab3
Cr-Commit-Position: refs/heads/master@{#412380}
==========

[commit-bot: I haz the power, 2016-08-16 23:50:56]

Patchset 2 (id:??) landed as
https://crrev.com/e4507bfea675457b628f51da133224f7b7f62ab3
Cr-Commit-Position: refs/heads/master@{#412380}

[Wez, 2016-08-19 00:57:04]

Rubbery stampy LGTM