Move some AX attrs from AXNodeData to AXTreeData.

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 e6b2ab48d7f1287f251abd4fe0c6a9975134ab6a..0c91252e987b212a053cf84d9769bc5e6fd6436e 100644
--- a/content/browser/accessibility/browser_accessibility_manager_mac.h
+++ b/content/browser/accessibility/browser_accessibility_manager_mac.h
@@ -16,11 +16,11 @@ class CONTENT_EXPORT BrowserAccessibilityManagerMac
  public:
   BrowserAccessibilityManagerMac(
       NSView* parent_view,
-      const SimpleAXTreeUpdate& initial_tree,
+      const ui::AXTreeUpdate& initial_tree,
       BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
 
-  static SimpleAXTreeUpdate GetEmptyDocument();
+  static ui::AXTreeUpdate GetEmptyDocument();
 
   BrowserAccessibility* GetFocus(BrowserAccessibility* root) override;