Fix domdistiller for new JS execution

components/dom_distiller/ios/distiller_page_ios.h

Index: components/dom_distiller/ios/distiller_page_ios.h
diff --git a/components/dom_distiller/ios/distiller_page_ios.h b/components/dom_distiller/ios/distiller_page_ios.h
index 2103959a76eebd8bedf1aad77b09aa24361126ee..1fdf87e9a91d7f70f544c2b251ac44feca9a33b0 100644
--- a/components/dom_distiller/ios/distiller_page_ios.h
+++ b/components/dom_distiller/ios/distiller_page_ios.h
@@ -44,7 +44,10 @@ class DistillerPageIOS : public DistillerPage {
   void OnLoadURLDone(web::PageLoadCompletionStatus load_completion_status);
 
   // Called once the |script_| has been evaluated on the page.
-  void HandleJavaScriptResultString(NSString* result);
+  void HandleJavaScriptResult(id result);
+
+  // Converts result of WKWebView script evaluation to base::Value
+  std::unique_ptr<base::Value> ValueResultFromScriptResult(id wk_result);
 
   web::BrowserState* browser_state_;
   GURL url_;