Fix delegate methods in shell_autofill_delegate.

Protocol implementation was not updated to match new signature.

Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ife923bfd9ad80962d322594fc7bacaf50a051a4e
Reviewed-on: https://chromium-review.googlesource.com/998678Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: John Wu <jzw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548620}

ios/web_view/shell/shell_autofill_delegate.m

@@ -38,7 +38,7 @@
 
 - (void)autofillController:(CWVAutofillController*)autofillController
     didFocusOnFieldWithName:(NSString*)fieldName
-             withIdentifier:(NSString*)fieldIdentifier
+            fieldIdentifier:(NSString*)fieldIdentifier
                    formName:(NSString*)formName
                       value:(NSString*)value {
   _autofillController = autofillController;
@@ -82,6 +82,7 @@
 
 - (void)autofillController:(CWVAutofillController*)autofillController
     didInputInFieldWithName:(NSString*)fieldName
+            fieldIdentifier:(NSString*)fieldIdentifier
                    formName:(NSString*)formName
                       value:(NSString*)value {
   // Not implemented.
@@ -89,6 +90,7 @@
 
 - (void)autofillController:(CWVAutofillController*)autofillController
     didBlurOnFieldWithName:(NSString*)fieldName
+           fieldIdentifier:(NSString*)fieldIdentifier
                   formName:(NSString*)formName
                      value:(NSString*)value {
   [_alertController dismissViewControllerAnimated:YES completion:nil];
@@ -96,6 +98,13 @@
   _autofillController = nil;
 }
 
+- (void)autofillController:(CWVAutofillController*)autofillController
+     didSubmitFormWithName:(NSString*)formName
+             userInitiated:(BOOL)userInitiated
+               isMainFrame:(BOOL)isMainFrame {
+  // Not implemented.
+}
+
 #pragma mark - Private Methods
 
 - (UIAlertController*)newAlertController {