Fix false negatives in system key events recognition

Fix false negatives in system key events recognition

Cmd + <some other modifier> + (b|i) should be treated as a system key event.

This was already reviewed in https://codereview.chromium.org/1215633003/

now rebased to new project structure.

Committed: https://crrev.com/914cedebca040969b4df294e6731b2db7f967a37
Cr-Commit-Position: refs/heads/master@{#351374}

[joleksy, 2015-09-29 12:12:39]

joleksy@opera.com changed reviewers:
+ mkwst@chromium.org

[joleksy, 2015-09-29 12:13:22]

@reviewer: does it look (still) ok to you?

[Mike West, 2015-09-29 12:41:53]

(still) LGTM.

[joleksy, 2015-09-29 12:45:54]

The CQ bit was checked by joleksy@opera.com

[commit-bot: I haz the power, 2015-09-29 12:46:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1374933002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1374933002/1

[commit-bot: I haz the power, 2015-09-29 12:56:00]

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

[commit-bot: I haz the power, 2015-09-29 12:56:01]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[joleksy, 2015-09-29 13:09:48]

joleksy@opera.com changed reviewers:
+ aelias@chromium.org

[joleksy, 2015-09-29 13:11:31]

On 2015/09/29 12:56:01, commit-bot: I haz the power wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

@aelias: it seems that I need review from current owner of the code, and OWNERS
file says it's you...

[aelias_OOO_until_Jul13, 2015-09-29 18:49:34]

rubberstamp lgtm

[joleksy, 2015-09-29 19:32:07]

The CQ bit was checked by joleksy@opera.com

[commit-bot: I haz the power, 2015-09-29 19:33:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1374933002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1374933002/1

[commit-bot: I haz the power, 2015-09-29 19:40:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-29 19:40:52]

Patchset 1 (id:??) landed as
https://crrev.com/914cedebca040969b4df294e6731b2db7f967a37
Cr-Commit-Position: refs/heads/master@{#351374}