Clean the new CRWContextMenuController

ios/web/public/web_state/context_menu_params.h

Index: ios/web/public/web_state/context_menu_params.h
diff --git a/ios/web/public/web_state/context_menu_params.h b/ios/web/public/web_state/context_menu_params.h
index 925fa30032caf5e38d19d3314f3d04ad6abc152b..d1bf918ff2f1cd1798056225778ff37fea3123e3 100644
--- a/ios/web/public/web_state/context_menu_params.h
+++ b/ios/web/public/web_state/context_menu_params.h
@@ -20,6 +20,15 @@ struct ContextMenuParams {
   ContextMenuParams(const ContextMenuParams& other);
   ~ContextMenuParams();
 
+  // Convenience constructor that creates a ContextMenuParams from a
+  // NSDictionary representing an HTML element.
+  // The fields "href", "src", "title", "referrerPolicy" and "innerText" will
+  // be used (if present) to generate the ContextMenuParams.
+  // All these fields must be NSString*.
+  // This constructor does not set fields relative to the touch event (view and
+  // location).
+  ContextMenuParams(const NSDictionary* element);
+
   // The title of the menu.
   base::scoped_nsobject<NSString> menu_title;