Implement UIElementsForSearchPredicate accessibility APIs for OS X.

content/browser/accessibility/browser_accessibility_cocoa.h

Index: content/browser/accessibility/browser_accessibility_cocoa.h
diff --git a/content/browser/accessibility/browser_accessibility_cocoa.h b/content/browser/accessibility/browser_accessibility_cocoa.h
index bb02c402412bf7655105489baef7fdb8089d18b5..8df7a90a5bea355d3f5d178428482f8e28c22d98 100644
--- a/content/browser/accessibility/browser_accessibility_cocoa.h
+++ b/content/browser/accessibility/browser_accessibility_cocoa.h
@@ -41,6 +41,9 @@
 // the manager.
 - (content::BrowserAccessibilityDelegate*)delegate;
 
+// Get the BrowserAccessibility that this object wraps.
+- (content::BrowserAccessibility*)browserAccessibility;
+
 // Convert the local objet's origin to a global point.
 - (NSPoint)pointInScreen:(NSPoint)origin
                     size:(NSSize)size;