Improved the reporting of background color information.

third_party/WebKit/Source/modules/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 704 matching lines @@
     // Internal function used to determine whether the result of calling |name| on this object would
     // return text that came from the an HTML label element or not. This is intended to be faster than calling
     // |name| or |textAlternative|, and without side effects (it won't call axObjectCache->getOrCreate).
     virtual bool nameFromLabelElement() const { return false; }
 
     //
     // Properties of static elements.
     //
 
     virtual const AtomicString& accessKey() const { return nullAtom; }
-    virtual RGBA32 backgroundColor() const { return Color::transparent; }
+    RGBA32 backgroundColor() const;
+    virtual RGBA32 computeBackgroundColor() const { return Color::transparent; }
     virtual RGBA32 color() const { return Color::black; }
     // Used by objects of role ColorWellRole.
     virtual RGBA32 colorValue() const { return Color::transparent; }
     virtual bool canvasHasFallbackContent() const { return false; }
     virtual String fontFamily() const { return nullAtom; }
     // Font size is in pixels.
     virtual float fontSize() const { return 0.0f; }
     virtual int headingLevel() const { return 0; }
     // 1-based, to match the aria-level spec.
     virtual unsigned hierarchicalLevel() const { return 0; }
@@ skipping 218 matching lines @@
 
     virtual bool nameFromContents() const;
 
     AccessibilityRole buttonRoleType() const;
 
     mutable Member<AXObject> m_parent;
 
     // The following cached attribute values (the ones starting with m_cached*)
     // are only valid if m_lastModificationCount matches AXObjectCacheImpl::modificationCount().
     mutable int m_lastModificationCount;
+    mutable RGBA32 m_cachedBackgroundColor;
     mutable bool m_cachedIsIgnored : 1;
     mutable bool m_cachedIsInertOrAriaHidden : 1;
     mutable bool m_cachedIsDescendantOfLeafNode : 1;
     mutable bool m_cachedIsDescendantOfDisabledNode : 1;
     mutable bool m_cachedHasInheritedPresentationalRole : 1;
     mutable bool m_cachedIsPresentationalChild : 1;
     mutable bool m_cachedAncestorExposesActiveDescendant : 1;
     mutable Member<const AXObject> m_cachedLiveRegionRoot;
 
     Member<AXObjectCacheImpl> m_axObjectCache;
 
     // Updates the cached attribute values. This may be recursive, so to prevent deadlocks,
     // functions called here may only search up the tree (ancestors), not down.
     void updateCachedAttributeValuesIfNeeded() const;
 
 private:
     static bool includesARIAWidgetRole(const String&);
     static bool hasInteractiveARIAAttribute(const Element&);
 
     static unsigned s_numberOfLiveAXObjects;
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, object.predicate)
 
 } // namespace blink
 
 #endif // AXObject_h