Removed Form Resubmission callback from CRWWebDelegate.

ios/web/web_state/ui/crw_web_controller.mm

Index: ios/web/web_state/ui/crw_web_controller.mm
diff --git a/ios/web/web_state/ui/crw_web_controller.mm b/ios/web/web_state/ui/crw_web_controller.mm
index d0950fbcb81ea84ea6b353172dec424f7d97ecc2..168ba8a0db8f5c54537a4829dd7070de0ce2cb23 100644
--- a/ios/web/web_state/ui/crw_web_controller.mm
+++ b/ios/web/web_state/ui/crw_web_controller.mm
@@ -5345,10 +5345,13 @@ const NSTimeInterval kSnapshotOverlayTransition = 0.5;
   // If the request is form submission or resubmission, then prompt the
   // user before proceeding.
   DCHECK(isFormPOSTResubmission);
-  [self.delegate webController:self
-      onFormResubmissionForRequest:nil
-                     continueBlock:webViewNavigationBlock
-                       cancelBlock:defaultNavigationBlock];
+  _webStateImpl->ShowRepostFormWarningDialog(
+      base::BindBlock(^(bool shouldContinue) {
+        if (shouldContinue)
+          webViewNavigationBlock();
+        else
+          defaultNavigationBlock();
+      }));
 }
 
 #pragma mark -