AX presentation role should be inherited to its required owned elements.

LayoutTests/accessibility/presentation-owned-elements.html

Index: LayoutTests/accessibility/presentation-owned-elements.html
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+<script src="../resources/js-test.js"></script>
+<script src="../resources/accessibility-helper.js"></script>
+<div>These lists have a static text role because they have a presentation role.</div>
+<ul role="presentation">
+    <li>Presentation Item 1</li>
+    <li>Presentation Item 2</li>
+</ul>
+
+<div>The first list item has a listitem role even if ul has a presentation role because it has an explicit role.</div>
+<ul role="presentation">
+    <li role="listitem">Explicit Item 1</li>
+    <li>Implicit Item 2</li>
+</ul>
+
+<div>These two tables have static text roles because they have presentation roles.</div>
+<table role="presentation">
+    <thead>
+    <tr>
+       <th>Presentation th</th>
+    </tr>
+    </thead>
+    <tbody>
+    <tr>
+       <td>Presentation th</td>
+    </tr>
+    </tbody>
+</table>
+
+<table role="presentation">
+    <tr>
+       <th>Presentation th</th>
+    </tr>
+</table>
+
+<div>The "Presentation th" has a static text role because it has a presentation role.</div>
+<table>
+    <tr role="presentation">
+       <th>Presentation th</th>
+    </tr>
+    <tr>
+        <td>Normal td</td>
+    </tr>
+</table>
+
+<div>The row for "Explicit th" has a row role even if table has a presentation role because it has an explicit role.</div>
+<table role="presentation">
+    <tr role="row">
+       <th>Explicit th</th>
+    </tr>
+    <tr>
+       <td>Implicit td</td>
+    </tr>
+</table>
+
+<div>The menu items except button have a static text role because it has a presentation role and is disabled.<br>
+Button has a button role because it has an explicit role.</div>
+<menu type="context" role="presentation">
+<input type="checkbox" name="vehicle" value="Bike" disabled> I have a bike
+<input type="button" role="button" value="Click me" disabled>
+<input type="radio" name="gender" value="male" disabled> Male
+<input type="radio" name="gender" value="female" disabled> Female
+</menu>
+
+<div>The option A has a static text role because it has a presentation role and is disabled.<br>
+The option B has option role because it has an explicit role.</div>
+<select multiple role="presentation" disabled>
+  <option value="A" disabled>A</option>
+  <option value="B" disabled role="option">B</option>
+</select>
+
+<p>End of test</p>
+<p id="description"></p>
+<div id="console"></div>
+<script>
+description("This test make sure that presentation role is inherited to required owned elements.");
+
+if (window.testRunner)
+    testRunner.dumpAsText();
+if (window.accessibilityController) {
+    buildAccessibilityTree(accessibilityController.focusedElement, 0, 1);
+}
+</script>