UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36

Steps to reproduce the problem:
The Chrome browser should not take into count:

- a table row that has the role="presentation" attribute and the "hidden" style/appearance
- a table column whose cells have the role="presentation" attribute in each row

when building the accessibility tree https://www.w3.org/TR/core-aam-1.1/#intro_treetypes

All data cells in both scenarios do not contain any content. These elements are used for organizing the presentation/layout structure: two tables for organizing a grid with a vertical scrollbar (the first table - for displaying a fixed header, the second table - for displaying data in a scrollable area).

The suggested accessibility tree is required for correct pronunciation by screen readers (such as JAWS and NVDA), which rely on this on accessibility compliant web sites.

Use the following HTML Table markup to reproduce these issues:

1)

<table>
    <thead>
        <tr>
            <th><a href="#">First header</a></th>
            <th>Second header</th>
        </tr>
    </thead>
    <tbody>
        <tr role="presentation" style="height: 0; font-size: 0; border-width: 0;">
            <td></td>
            <td></td>
        </tr>
        <tr>
            <td>First cell</td>
            <td>Second cell</td>
        </tr>
    </tbody>
</table>

2)

<table>
    <thead>
        <tr>
            <th><a href="#">First header</a></th>
            <th role="presentation"></th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>First cell</td>
            <td role="presentation"></td>
        </tr>
        <tr>
            <td>Second cell</td>
            <td role="presentation"></td>
        </tr>
    </tbody>
</table>

See related discussions on the NVDA GitHub repository/forum:
https://github.com/nvaccess/nvda/issues/5717
https://github.com/nvaccess/nvda/issues/5718

What is the expected behavior?
1) table with 2 rows and 2 columns..
2) table with 3 rows and 1 column...

What went wrong?
1) table with 3 rows and 2 columns...
2) table with 3 rows and 2 columns...

Did this work before? N/A 

Chrome version: 49.0.2623.87  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 21.0 r0