[Payment Request] Protocol for payments items with accessoryType property

ios/chrome/browser/payments/cells/payments_has_accessory_type.h

Index: ios/chrome/browser/payments/cells/payments_has_accessory_type.h
diff --git a/ios/chrome/browser/payments/cells/payments_has_accessory_type.h b/ios/chrome/browser/payments/cells/payments_has_accessory_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ca597cc5420fe8bc4cd7d47c6d045bb02db9d55
--- /dev/null
+++ b/ios/chrome/browser/payments/cells/payments_has_accessory_type.h
@@ -0,0 +1,19 @@
+// 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 IOS_CHROME_BROWSER_PAYMENTS_CELLS_PAYMENTS_HAS_ACCESSORY_TYPE_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_CELLS_PAYMENTS_HAS_ACCESSORY_TYPE_H_
+
+#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
+
+// Protocol adopted by the payments collection view items that set the accessory
+// view type on their represented cells.
+@protocol PaymentsHasAccessoryType

[Justin Donnelly, 2017/04/17 15:21:58]

Does this name conform to some existing pattern? Like, are there other protocols
that expose a property named "Has<Property>"? It seems reasonable but since this
is probably a type of protocol used elsewhere I just want to make sure we're not
introducing a different way to refer to it.

[Moe, 2017/04/17 15:45:30]

I'm not following any convention in naming nor my search came up with any
existing "Has<Property>" protocol name. I simply came up with a name that made
sense.
Since the use of this protocol will remain within the /payments path, it should
be ok. If lpromero@ or @gambard object to the naming in the follow up CL i can
certainly rename it.  

+
+// The accessory view type for the represented cell.
+@property(nonatomic) MDCCollectionViewCellAccessoryType accessoryType;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_CELLS_PAYMENTS_HAS_ACCESSORY_TYPE_H_