https://bugs.webkit.org/show_bug.cgi?id=30842

Reviewed by Beth Dakin.

WebCore: 

Implement support for ARIA "tab", "tabpanel" and "tablist".
As a consequence, we also needed to implement aria-selected
and aria-controls.

Tests: accessibility/aria-controls-with-tabs.html
       accessibility/aria-tab-roles.html

* accessibility/AXObjectCache.cpp:
* accessibility/AccessibilityObject.h:
* accessibility/AccessibilityRenderObject.cpp:
* accessibility/AccessibilityRenderObject.h:
* accessibility/mac/AccessibilityObjectWrapper.mm:
* html/HTMLAttributeNames.in:

WebKit: 

Add a localizable string for tab panel.

* English.lproj/Localizable.strings:
* StringsNotToBeLocalized.txt:

WebKit/mac: 

* WebCoreSupport/WebViewFactory.mm:
(-[WebViewFactory AXARIAContentGroupText:]):

WebKitTools: 

* DumpRenderTree/AccessibilityUIElement.cpp:
* DumpRenderTree/AccessibilityUIElement.h:
* DumpRenderTree/gtk/AccessibilityUIElementGtk.cpp:
* DumpRenderTree/mac/AccessibilityUIElementMac.mm:
* DumpRenderTree/win/AccessibilityUIElementWin.cpp:

LayoutTests: 

* accessibility/aria-controls-with-tabs-expected.txt: Added.
* accessibility/aria-controls-with-tabs.html: Added.
* accessibility/aria-tab-roles.html: Added.
* platform/gtk/Skipped:
* platform/mac/accessibility/aria-tab-roles-expected.txt: Added.
* platform/win/Skipped:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@50409 268f45cc-cd09-0410-ab3c-d52691b4dbfc