Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXScrollbar.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/accessibility/AXScrollbar.h"
 
+#include "core/dom/AXObjectCache.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
 
 namespace blink {
 
-AXScrollbar::AXScrollbar(Scrollbar* scrollbar)
-    : m_scrollbar(scrollbar)
+AXScrollbar::AXScrollbar(Scrollbar* scrollbar, AXObjectCache* axObjectCache)
+    : AXMockObject(axObjectCache)
+    , m_scrollbar(scrollbar)
 {
     ASSERT(scrollbar);
 }
 
 void AXScrollbar::detachFromParent()
 {
     m_scrollbar = nullptr;
     AXMockObject::detachFromParent();
 }
 
-PassRefPtr<AXScrollbar> AXScrollbar::create(Scrollbar* scrollbar)
+PassRefPtr<AXScrollbar> AXScrollbar::create(Scrollbar* scrollbar, AXObjectCache* axObjectCache)
 {
-    return adoptRef(new AXScrollbar(scrollbar));
+    return adoptRef(new AXScrollbar(scrollbar, axObjectCache));
 }
 
 LayoutRect AXScrollbar::elementRect() const
 {
     if (!m_scrollbar)
         return LayoutRect();
 
     return m_scrollbar->frameRect();
 }
 
@@ skipping 39 matching lines @@
         return;
 
     if (!m_scrollbar->scrollableArea())
         return;
 
     float newValue = value * m_scrollbar->maximum();
     m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
 }
 
 } // namespace blink