[Payment Request] Picker view + showcase integration + egtests

ios/showcase/core/showcase_model.mm

 // Copyright 2016 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/showcase/core/showcase_model.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
@@ skipping 14 matching lines @@
       showcase::kClassForDisplayKey : @"MenuViewController",
       showcase::kClassForInstantiationKey : @"MenuViewController",
       showcase::kUseCaseKey : @"Tools menu",
     },
     @{
       showcase::kClassForDisplayKey : @"PaymentRequestEditViewController",
       showcase::kClassForInstantiationKey : @"SCPaymentsEditorCoordinator",
       showcase::kUseCaseKey : @"Generic payment request editor",
     },
     @{
+      showcase::kClassForDisplayKey : @"PaymentRequestPickerViewController",
+      showcase::kClassForInstantiationKey : @"SCPaymentsPickerCoordinator",
+      showcase::kUseCaseKey : @"Payment request picker view",
+    },
+    @{
       showcase::kClassForDisplayKey : @"SettingsViewController",
       showcase::kClassForInstantiationKey : @"SCSettingsCoordinator",
       showcase::kUseCaseKey : @"Main settings screen",
     },
     @{
       showcase::kClassForDisplayKey : @"TabGridViewController",
       showcase::kClassForInstantiationKey : @"SCTabGridCoordinator",
       showcase::kUseCaseKey : @"Tab grid",
     },
     @{
@@ skipping 18 matching lines @@
     },
     @{
       showcase::kClassForDisplayKey : @"UITableViewCell",
       showcase::kClassForInstantiationKey : @"UIKitTableViewCellViewController",
       showcase::kUseCaseKey : @"UIKit Table Cells",
     },
   ];
 }
 
 @end