Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXScrollView.h

Index: Source/modules/accessibility/AXScrollView.h
diff --git a/Source/modules/accessibility/AXScrollView.h b/Source/modules/accessibility/AXScrollView.h
index cd7ce0041ec4a1cc24791e064e639c34467329e9..cd5424d47afd6e2a084fe016d46b83227c3c21aa 100644
--- a/Source/modules/accessibility/AXScrollView.h
+++ b/Source/modules/accessibility/AXScrollView.h
@@ -30,13 +30,14 @@
 
 namespace blink {
 
+class AXObjectCache;
 class AXScrollbar;
 class Scrollbar;
 class FrameView;
 
 class AXScrollView final : public AXObject {
 public:
-    static PassRefPtr<AXScrollView> create(FrameView*);
+    static PassRefPtr<AXScrollView> create(FrameView*, AXObjectCache*);
     virtual AccessibilityRole roleValue() const override { return ScrollAreaRole; }
     FrameView* scrollView() const { return m_scrollView; }
 
@@ -48,7 +49,7 @@ protected:
     virtual void scrollTo(const IntPoint&) const override;
 
 private:
-    explicit AXScrollView(FrameView*);
+    AXScrollView(FrameView*, AXObjectCache*);
 
     virtual bool computeAccessibilityIsIgnored() const override;
     virtual bool isAXScrollView() const override { return true; }