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..9be9ee3b52646c04548fcd28cb7642b0045972bf 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 isPresentational() const { return roleValue() == NoneRole || roleValue() == PresentationalRole; }
     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 hasInheritedPresentationalRole() const { return m_cachedHasInheritedPresentationalRole; }
+
 protected:
     AXID m_id;
     AccessibilityChildrenVector m_children;
@@ -630,6 +633,7 @@ protected:
     LayoutRect m_explicitElementRect;
 
     virtual bool computeAccessibilityIsIgnored() const { return true; }
+    virtual bool computeHasInheritedPresentationalRole() 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_cachedHasInheritedPresentationalRole : 1;
     mutable const AXObject* m_cachedLiveRegionRoot;
 
     AXObjectCacheImpl* m_axObjectCache;