[ETW] Fix wrong index in UpdateETWCategoryGroupEnabledFlags resulting in overflow.

[ETW] Fix wrong index in UpdateETWCategoryGroupEnabledFlags resulting in overflow.

BUG=522669
Committed: https://crrev.com/f9da9005080b0ff3011bb7a060e26b739f971128
Cr-Commit-Position: refs/heads/master@{#346248}

[Georges Khalil, 2015-08-28 15:05:40]

georgesak@chromium.org changed reviewers:
+ dsinclair@chromium.org

[Georges Khalil, 2015-08-28 17:55:39]

Dan, PTAL.

[brucedawson, 2015-08-28 18:30:25]

brucedawson@chromium.org changed reviewers:
+ brucedawson@chromium.org

[brucedawson, 2015-08-28 18:30:25]

It's annoying that code analysis didn't find this one. Unfortunately /analyze
doesn't have good heuristics for this case. I also wish that I had noticed in
during code review. Oh well.

Consider referencing one of the overall ETW tracing bugs instead of leaving bug=
blank.

lgtm.

[dsinclair, 2015-08-28 18:44:31]

lgtm. Please fill in or remove the BUG= line.

[Georges Khalil, 2015-08-28 20:49:46]

On 2015/08/28 18:44:31, dsinclair wrote:
> lgtm. Please fill in or remove the BUG= line.

Thanks, assigned it to an open bug. Sending this to CQ.

[Georges Khalil, 2015-08-28 20:50:01]

The CQ bit was checked by georgesak@chromium.org

[commit-bot: I haz the power, 2015-08-28 20:50:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1319183002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1319183002/1

[commit-bot: I haz the power, 2015-08-28 22:28:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-28 22:29:00]

Patchset 1 (id:??) landed as
https://crrev.com/f9da9005080b0ff3011bb7a060e26b739f971128
Cr-Commit-Position: refs/heads/master@{#346248}