Load offline page if reading list entry takes more than 1s to load.

ios/chrome/browser/ui/url_loader.h

Index: ios/chrome/browser/ui/url_loader.h
diff --git a/ios/chrome/browser/ui/url_loader.h b/ios/chrome/browser/ui/url_loader.h
index 88d22535657abe1e55d40c189ea75b798d34b36e..7026933974bf66a0714e49eb1c8881ca1c0cc83d 100644
--- a/ios/chrome/browser/ui/url_loader.h
+++ b/ios/chrome/browser/ui/url_loader.h
@@ -34,6 +34,13 @@ enum OpenPosition {
            transition:(ui::PageTransition)transition
     rendererInitiated:(BOOL)rendererInitiated;
 
+// Load a new url.
+- (void)loadURL:(const GURL&)url
+             referrer:(const web::Referrer&)referrer
+           transition:(ui::PageTransition)transition
+    rendererInitiated:(BOOL)rendererInitiated
+    extraData:(NSDictionary*)extraData;
+
 // Load a new URL on a new page/tab. The |referrer| and |windowName| are
 // optional. The tab will be placed in the model according to |appendTo|.
 - (void)webPageOrderedOpen:(const GURL&)url