[Payment Request] Updates PaymentRequestEditViewController in showcase

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

Index: ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm
diff --git a/ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm b/ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm
index 05cf2b4dd95d90aca71c5ecd9ebea66a8eee71d0..c424d23826ff50c6608180ec7b9aaaddfdc313f7 100644
--- a/ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm
+++ b/ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm
@@ -322,8 +322,16 @@ typedef NS_ENUM(NSInteger, ItemType) {
     UIPickerView* pickerView = [[UIPickerView alloc] initWithFrame:CGRectZero];
     pickerView.delegate = self;
     pickerView.dataSource = self;
+    pickerView.accessibilityIdentifier =
+        [NSString stringWithFormat:@"%@_pickerView", field.label];
     [self.pickerViews setObject:pickerView forKey:key];
     item.inputView = pickerView;
+
+    // Set UIPickerView's default selected row.
+    [pickerView reloadAllComponents];
+    [pickerView selectRow:[options indexOfObject:field.value]
+              inComponent:0
+                 animated:YES];

[lpromero, 2017/05/30 11:50:36]

Since you are just creating the picker, does it need to animate the selection
here?

[Moe, 2017/05/31 12:04:58]

Done.

   }
 
   // Reload the item.