Views a11y: Add comment to explain usage of AXNodeData's |state| member.

Views a11y: Add comment to explain usage of AXNodeData's |state| member.

AXNodeData::state is a bitmask used for setting accessible state flags such as
ui::AX_STATE_DISABLED. It is initialised to 0xFFFFFF, which turns all flags on.
This is done in order to more easily catch bugs where no flags are set at all -
it must be cleared to 0x0 before use. Add a comment explaining this.

BUG=668569
Committed: https://crrev.com/2f4e229335d9aa02d6a90307537fef92ba8be091
Cr-Commit-Position: refs/heads/master@{#435020}

[Patti Lor, 2016-11-25 03:43:26]

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

[commit-bot: I haz the power, 2016-11-25 03:43:36]

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

[Patti Lor, 2016-11-25 03:44:33]

patricialor@chromium.org changed reviewers:
+ dmazzoni@chromium.org

[Patti Lor, 2016-11-25 03:44:34]

Hi dmazzoni, PTAL - comment change only.

[commit-bot: I haz the power, 2016-11-25 04:33:56]

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

[commit-bot: I haz the power, 2016-11-25 04:33:57]

Dry run: This issue passed the CQ dry run.

[dmazzoni, 2016-11-29 16:34:41]

The CQ bit was checked by dmazzoni@chromium.org

[dmazzoni, 2016-11-29 16:34:42]

lgtm

[commit-bot: I haz the power, 2016-11-29 16:34:57]

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, 2016-11-29 17:24:33]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480437281698890, "parent_rev":
"146abad721746625071a6a599a5bb3ce92bb2568", "commit_rev":
"00574b55a5638f0122dac2a1a7cd539d00a26f2f"}

[commit-bot: I haz the power, 2016-11-29 17:24:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-29 17:28:36]

Description was changed from

==========
Views a11y: Add comment to explain usage of AXNodeData's |state| member.

AXNodeData::state is a bitmask used for setting accessible state flags such as
ui::AX_STATE_DISABLED. It is initialised to 0xFFFFFF, which turns all flags on.
This is done in order to more easily catch bugs where no flags are set at all -
it must be cleared to 0x0 before use. Add a comment explaining this.

BUG=668569
==========

to

==========
Views a11y: Add comment to explain usage of AXNodeData's |state| member.

AXNodeData::state is a bitmask used for setting accessible state flags such as
ui::AX_STATE_DISABLED. It is initialised to 0xFFFFFF, which turns all flags on.
This is done in order to more easily catch bugs where no flags are set at all -
it must be cleared to 0x0 before use. Add a comment explaining this.

BUG=668569

Committed: https://crrev.com/2f4e229335d9aa02d6a90307537fef92ba8be091
Cr-Commit-Position: refs/heads/master@{#435020}
==========

[commit-bot: I haz the power, 2016-11-29 17:28:37]

Patchset 1 (id:??) landed as
https://crrev.com/2f4e229335d9aa02d6a90307537fef92ba8be091
Cr-Commit-Position: refs/heads/master@{#435020}