CRD iOS: Adding pin entry view controller.

remoting/client/ios/app/pin_entry_view_controller.h

Index: remoting/client/ios/app/pin_entry_view_controller.h
diff --git a/remoting/client/ios/app/pin_entry_view_controller.h b/remoting/client/ios/app/pin_entry_view_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..734dc949ecadf2304b1dbf58de47c7a8074741c9
--- /dev/null
+++ b/remoting/client/ios/app/pin_entry_view_controller.h
@@ -0,0 +1,21 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_CLIENT_IOS_APP_PIN_ENTRY_VIEW_CONTROLLER_H_
+#define REMOTING_CLIENT_IOS_APP_PIN_ENTRY_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+typedef void (^PinEntryModalCallback)(NSString* hostPin, BOOL createPairing);
+
+// PinEntryViewController is expected to be created, displayed and then

[Lambros, 2017/04/05 00:17:40]

If the user cancels the dialog without entering a PIN, will the callback simply
not be triggered? Does there need to be a Cancelled callback for this case?

[nicholss, 2017/04/05 16:25:41]

Hm. I have not implemented the callback reaction yet, this class was just
getting the layout for the pin modal done. I might send in a null host pin as a
cancel. It might have to get reworked as that development gets finished later.

+// destroyed after the pin entry is finished; not resued.

[Lambros, 2017/04/05 00:17:40]

s/resued/reused

[nicholss, 2017/04/05 16:25:41]

Done.

+@interface PinEntryViewController : UIViewController
+
+// Callback will be used to return the pin entry result.
+- (id)initWithCallback:(PinEntryModalCallback)callback;
+
+@end
+
+#endif  // REMOTING_CLIENT_IOS_APP_PIN_ENTRY_VIEW_CONTROLLER_H_