Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXMediaControls.h

Index: Source/modules/accessibility/AXMediaControls.h
diff --git a/Source/modules/accessibility/AXMediaControls.h b/Source/modules/accessibility/AXMediaControls.h
index 51892d85a504c9e31baea4f8acd805b3cfe04cee..471744db0d5a2c243f010dddb951d925ebb58202 100644
--- a/Source/modules/accessibility/AXMediaControls.h
+++ b/Source/modules/accessibility/AXMediaControls.h
@@ -35,10 +35,12 @@
 
 namespace blink {
 
+class AXObjectCache;
+
 class AccessibilityMediaControl : public AXRenderObject {
 
 public:
-    static PassRefPtr<AXObject> create(RenderObject*);
+    static PassRefPtr<AXObject> create(RenderObject*, AXObjectCache*);
     virtual ~AccessibilityMediaControl() { }
 
     virtual AccessibilityRole roleValue() const override;
@@ -48,7 +50,7 @@ public:
     virtual String helpText() const override;
 
 protected:
-    explicit AccessibilityMediaControl(RenderObject*);
+    AccessibilityMediaControl(RenderObject*, AXObjectCache*);
     MediaControlElementType controlType() const;
     virtual bool computeAccessibilityIsIgnored() const override;
 };
@@ -57,7 +59,7 @@ protected:
 class AccessibilityMediaTimeline final : public AXSlider {
 
 public:
-    static PassRefPtr<AXObject> create(RenderObject*);
+    static PassRefPtr<AXObject> create(RenderObject*, AXObjectCache*);
     virtual ~AccessibilityMediaTimeline() { }
 
     virtual String helpText() const override;
@@ -65,14 +67,14 @@ public:
     const AtomicString& getAttribute(const QualifiedName& attribute) const;
 
 private:
-    explicit AccessibilityMediaTimeline(RenderObject*);
+    AccessibilityMediaTimeline(RenderObject*, AXObjectCache*);
 };
 
 
 class AXMediaControlsContainer final : public AccessibilityMediaControl {
 
 public:
-    static PassRefPtr<AXObject> create(RenderObject*);
+    static PassRefPtr<AXObject> create(RenderObject*, AXObjectCache*);
     virtual ~AXMediaControlsContainer() { }
 
     virtual AccessibilityRole roleValue() const override { return ToolbarRole; }
@@ -81,7 +83,7 @@ public:
     virtual String accessibilityDescription() const override;
 
 private:
-    explicit AXMediaControlsContainer(RenderObject*);
+    AXMediaControlsContainer(RenderObject*, AXObjectCache*);
     bool controllingVideoElement() const;
     virtual bool computeAccessibilityIsIgnored() const override;
 };
@@ -90,7 +92,7 @@ private:
 class AccessibilityMediaTimeDisplay final : public AccessibilityMediaControl {
 
 public:
-    static PassRefPtr<AXObject> create(RenderObject*);
+    static PassRefPtr<AXObject> create(RenderObject*, AXObjectCache*);
     virtual ~AccessibilityMediaTimeDisplay() { }
 
     virtual AccessibilityRole roleValue() const override { return StaticTextRole; }
@@ -99,7 +101,7 @@ public:
     virtual String accessibilityDescription() const override;
 
 private:
-    explicit AccessibilityMediaTimeDisplay(RenderObject*);
+    AccessibilityMediaTimeDisplay(RenderObject*, AXObjectCache*);
     virtual bool computeAccessibilityIsIgnored() const override;
 };