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

Source/modules/accessibility/AXObject.cpp

Index: Source/modules/accessibility/AXObject.cpp
diff --git a/Source/modules/accessibility/AXObject.cpp b/Source/modules/accessibility/AXObject.cpp
index d451350c269b3c73125e32f061c7b31bacc2fce0..88f1aa345f10c32a08a734bed97a1d628b61b1fe 100644
--- a/Source/modules/accessibility/AXObject.cpp
+++ b/Source/modules/accessibility/AXObject.cpp
@@ -237,6 +237,7 @@ AXObject::AXObject(AXObjectCacheImpl* axObjectCache)
     , m_cachedIsInertOrAriaHidden(false)
     , m_cachedIsDescendantOfBarrenParent(false)
     , m_cachedIsDescendantOfDisabledNode(false)
+    , m_cachedHasInheritedPresentationRole(false)
     , m_cachedLiveRegionRoot(0)
     , m_axObjectCache(axObjectCache)
 {
@@ -373,6 +374,7 @@ void AXObject::updateCachedAttributeValuesIfNeeded() const
     m_cachedIsInertOrAriaHidden = computeIsInertOrAriaHidden();
     m_cachedIsDescendantOfBarrenParent = computeIsDescendantOfBarrenParent();
     m_cachedIsDescendantOfDisabledNode = computeIsDescendantOfDisabledNode();
+    m_cachedHasInheritedPresentationRole = computeHasInheritedPresentationRole();
     m_cachedIsIgnored = computeAccessibilityIsIgnored();
     m_cachedLiveRegionRoot = isLiveRegion() ?
         this :