Use dropdown list for admin areas in pr form.

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java
index da90122fc5af289965681be875edb45f3f87459d..10c534ad3c1f112105e3823a453792809639605d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorView.java
@@ -330,7 +330,7 @@ public class EditorView extends AlwaysDismissedDialog implements OnClickListener
                 if (nextFieldModel.isFullLine()) useFullLine = true;
             }
 
-            if (useFullLine) {
+            if (useFullLine || isLastField) {
                 addFieldViewToEditor(mDataView, fieldModel);
             } else {
                 // Create a LinearLayout to put it and the next view side by side.
@@ -387,8 +387,8 @@ public class EditorView extends AlwaysDismissedDialog implements OnClickListener
                     if (mObserverForTest != null) mObserverForTest.onPaymentRequestReadyToEdit();
                 }
             };
-            EditorDropdownField dropdownView =
-                    new EditorDropdownField(mContext, parent, fieldModel, prepareEditorRunnable);
+            EditorDropdownField dropdownView = new EditorDropdownField(
+                    mContext, parent, fieldModel, prepareEditorRunnable, mObserverForTest);
             mFieldViews.add(dropdownView);
             mDropdownFields.add(dropdownView.getDropdown());