Refactor BrowserAccessibility to prepare for AXNode (re-land)

content/browser/accessibility/browser_accessibility_win.h

Index: content/browser/accessibility/browser_accessibility_win.h
diff --git a/content/browser/accessibility/browser_accessibility_win.h b/content/browser/accessibility/browser_accessibility_win.h
index 713960ac244688d930ddd0b6c2d84fab407ca072..137f8b962b6dae52cfb2a8effb4c558ce925306d 100644
--- a/content/browser/accessibility/browser_accessibility_win.h
+++ b/content/browser/accessibility/browser_accessibility_win.h
@@ -772,10 +772,6 @@ BrowserAccessibilityWin
     return ia2_attributes_;
   }
 
-  // BrowserAccessibility::role is shadowed by IAccessible2::role, so
-  // we provide an alias for it.
-  int32 blink_role() const { return BrowserAccessibility::role(); }
-
  private:
   // Add one to the reference count and return the same object. Always
   // use this method when returning a BrowserAccessibilityWin object as