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

Source/modules/accessibility/AXObject.h

Index: Source/modules/accessibility/AXObject.h
diff --git a/Source/modules/accessibility/AXObject.h b/Source/modules/accessibility/AXObject.h
index e00d458144127ff9ad748be01800fab8dd39117a..dc67f551659356d987b2acec9bd67117c3bbbb1f 100644
--- a/Source/modules/accessibility/AXObject.h
+++ b/Source/modules/accessibility/AXObject.h
@@ -378,6 +378,7 @@ public:
     virtual bool isNonNativeTextControl() const { return false; } // contenteditable or role=textbox
     virtual bool isPasswordField() const { return false; }
     virtual bool isPasswordFieldAndShouldHideValue() const;
+    bool isPresentation() const { return roleValue() == NoneRole || roleValue() == PresentationalRole; }

[dmazzoni, 2015/04/01 15:27:55]

Name this isPresentational() to be consistent with:

    virtual bool ariaRoleHasPresentationalChildren() const { return false; }
    virtual bool isPresentationalChildOfAriaRole() const { return false; }

Maybe throughout the change, use "is presentational" to mean something whose
role is "presentation" or "none".

[je_julie(Not used), 2015/04/02 05:51:28]

Done.

     virtual bool isProgressIndicator() const { return false; }
     bool isRadioButton() const { return roleValue() == RadioButtonRole; }
     bool isScrollbar() const { return roleValue() == ScrollBarRole; }
@@ -621,6 +622,8 @@ public:
     static const AtomicString& roleName(AccessibilityRole);
     static bool isInsideFocusableElementOrARIAWidget(const Node&);
 
+    bool hasInheritedPresentationRole() const { return m_cachedHasInheritedPresentationRole; }
+
 protected:
     AXID m_id;
     AccessibilityChildrenVector m_children;
@@ -630,6 +633,7 @@ protected:
     LayoutRect m_explicitElementRect;
 
     virtual bool computeAccessibilityIsIgnored() const { return true; }
+    virtual bool computeHasInheritedPresentationRole() const { return false; }
 
     // If this object itself scrolls, return its ScrollableArea.
     virtual ScrollableArea* getScrollableAreaIfScrollable() const { return 0; }
@@ -651,6 +655,7 @@ protected:
     mutable bool m_cachedIsInertOrAriaHidden : 1;
     mutable bool m_cachedIsDescendantOfBarrenParent : 1;
     mutable bool m_cachedIsDescendantOfDisabledNode : 1;
+    mutable bool m_cachedHasInheritedPresentationRole : 1;
     mutable const AXObject* m_cachedLiveRegionRoot;
 
     AXObjectCacheImpl* m_axObjectCache;