Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXSpinButton.cpp

Index: Source/modules/accessibility/AXSpinButton.cpp
diff --git a/Source/modules/accessibility/AXSpinButton.cpp b/Source/modules/accessibility/AXSpinButton.cpp
index dcc083f471749aa33f1cc18428730bfdf8dfa099..1f24065ab7763ab4b4e91e980de7eb17c86a6483 100644
--- a/Source/modules/accessibility/AXSpinButton.cpp
+++ b/Source/modules/accessibility/AXSpinButton.cpp
@@ -31,13 +31,14 @@
 
 namespace blink {
 
-PassRefPtr<AXSpinButton> AXSpinButton::create()
+PassRefPtr<AXSpinButton> AXSpinButton::create(AXObjectCache* axObjectCache)
 {
-    return adoptRef(new AXSpinButton);
+    return adoptRef(new AXSpinButton(axObjectCache));
 }
 
-AXSpinButton::AXSpinButton()
-    : m_spinButtonElement(0)
+AXSpinButton::AXSpinButton(AXObjectCache* axObjectCache)
+    : AXMockObject(axObjectCache)
+    , m_spinButtonElement(0)
 {
 }
 
@@ -81,14 +82,15 @@ void AXSpinButton::step(int amount)
 
 // AXSpinButtonPart
 
-AXSpinButtonPart::AXSpinButtonPart()
-    : m_isIncrementor(false)
+AXSpinButtonPart::AXSpinButtonPart(AXObjectCache* axObjectCache)
+    : AXMockObject(axObjectCache)
+    , m_isIncrementor(false)
 {
 }
 
-PassRefPtr<AXSpinButtonPart> AXSpinButtonPart::create()
+PassRefPtr<AXSpinButtonPart> AXSpinButtonPart::create(AXObjectCache* axObjectCache)
 {
-    return adoptRef(new AXSpinButtonPart);
+    return adoptRef(new AXSpinButtonPart(axObjectCache));
 }
 
 LayoutRect AXSpinButtonPart::elementRect() const