[Payment Request] Address edit view controller (Part 2)

ios/chrome/browser/ui/payments/payment_request_editor_field.mm

 // 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.
 
 #import "ios/chrome/browser/ui/payments/payment_request_editor_field.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @implementation EditorField
 
 @synthesize autofillUIType = _autofillUIType;
 @synthesize fieldType = _fieldType;
 @synthesize label = _label;
 @synthesize value = _value;
 @synthesize displayValue = _displayValue;
 @synthesize required = _required;
+@synthesize enabled = _enabled;
 @synthesize item = _item;
 @synthesize sectionIdentifier = _sectionIdentifier;
 
 - (instancetype)initWithAutofillUIType:(AutofillUIType)autofillUIType
                              fieldType:(EditorFieldType)fieldType
                                  label:(NSString*)label
                                  value:(NSString*)value
                               required:(BOOL)required {
   self = [super init];
   if (self) {
     _autofillUIType = autofillUIType;
     _fieldType = fieldType;
     _label = label;
     _value = value;
     _required = required;
+    _enabled = YES;
   }
   return self;
 }
 
 - (NSString*)description {
   return [NSString stringWithFormat:@"Label: %@, Value: %@", _label, _value];
 }
 
 @end