[CRD iOS] Send key events to the session.

remoting/ios/client_keyboard.h

 // 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_CLIENT_KEYBOARD_H_
 #define REMOTING_CLIENT_IOS_CLIENT_KEYBOARD_H_
 
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
+@protocol ClientKeyboardDelegate<NSObject>
+- (void)clientKeyboardShouldSend:(NSString*)text;
+- (void)clientKeyboardShouldDelete;
+@end
+
 @interface ClientKeyboard : UIView<UIKeyInput, UITextInputTraits>
 
 @property(nonatomic) UIKeyboardAppearance keyboardAppearance;
 @property(nonatomic) UIKeyboardType keyboardType;
 @property(nonatomic) UITextAutocapitalizationType autocapitalizationType;
 @property(nonatomic) UITextAutocorrectionType autocorrectionType;
 @property(nonatomic) UITextSpellCheckingType spellCheckingType;
 
+// This delegate is used to call back to handler key entry.
+@property(weak, nonatomic) id<ClientKeyboardDelegate> delegate;

[Yuwei, 2017/05/16 00:47:30]

Have you considered just storing and using KeyboardInterpreter* here?

[nicholss, 2017/05/16 17:13:39]

I have, there is a comment about that from last review round. I would like to
hold off on flattening the ClientKeyboardDelegate until mod keys and external
keyboards have finished being implemented just incase there is something funky,
and then if ClientKeyboardDelegate is still not doing much work I will axe it.

 @end
 
 #endif  //  REMOTING_CLIENT_IOS_CLIENT_KEYBOARD_H_