Test aria-pressed=mixed on windows

content/browser/accessibility/browser_accessibility_manager_mac.h

Index: content/browser/accessibility/browser_accessibility_manager_mac.h
diff --git a/content/browser/accessibility/browser_accessibility_manager_mac.h b/content/browser/accessibility/browser_accessibility_manager_mac.h
index 406793aeaa97288f6990ecade04b9da252b5f0da..5f5f83c3a820a316301465d908e8c5094a76d038 100644
--- a/content/browser/accessibility/browser_accessibility_manager_mac.h
+++ b/content/browser/accessibility/browser_accessibility_manager_mac.h
@@ -49,10 +49,6 @@ class CONTENT_EXPORT BrowserAccessibilityManagerMac
   void OnNodeDataWillChange(ui::AXTree* tree,
                             const ui::AXNodeData& old_node_data,
                             const ui::AXNodeData& new_node_data) override;
-  void OnStateChanged(ui::AXTree* tree,
-                      ui::AXNode* node,
-                      ui::AXState state,
-                      bool new_value) override;
 
   // Returns an autoreleased object.
   NSDictionary* GetUserInfoForSelectedTextChangedNotification();