Removed Form Resubmission callback from CRWWebDelegate.

ios/web/web_state/web_state_delegate_stub.mm

Index: ios/web/web_state/web_state_delegate_stub.mm
diff --git a/ios/web/web_state/web_state_delegate_stub.mm b/ios/web/web_state/web_state_delegate_stub.mm
index b86a9ebad9b29928ed769a48d2ead4dd87fee79a..05e53fb29a01d7e4d125dd461ef4bb82fa7ea723 100644
--- a/ios/web/web_state/web_state_delegate_stub.mm
+++ b/ios/web/web_state/web_state_delegate_stub.mm
@@ -18,6 +18,7 @@
 
 @synthesize webState = _webState;
 @synthesize changedProgress = _changedProgress;
+@synthesize repostFormWarningRequested = _repostFormWarningRequested;
 @synthesize authenticationRequested = _authenticationRequested;
 
 - (web::WebState*)webState:(web::WebState*)webState
@@ -39,6 +40,12 @@
   return YES;
 }
 
+- (void)webState:(web::WebState*)webState
+    runRepostFormDialogWithCompletionHandler:(void (^)(BOOL))handler {
+  _webState = webState;
+  _repostFormWarningRequested = YES;
+}
+
 - (web::JavaScriptDialogPresenter*)javaScriptDialogPresenterForWebState:
     (web::WebState*)webState {
   _webState = webState;