Add billing address to credit cards.

chrome/android/java/res/layout/autofill_credit_card_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2014 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. -->
 
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fillViewport="true"
@@ skipping 79 matching lines @@
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:orientation="vertical" >
                       <Spinner
                           android:id="@+id/autofill_credit_card_editor_year_spinner"
                           android:layout_width="match_parent"
                           android:layout_height="wrap_content" />
                       <View style="@style/PreferenceSpinnerUnderlineView"  />
                 </LinearLayout>
             </LinearLayout>
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:focusable="true"
+                android:paddingTop="@dimen/pref_autofill_field_top_padding"

[gone, 2016/06/23 15:56:27]

Any reason why there isn't a bottom padding here?

[please use gerrit instead, 2016/06/23 16:00:44]

Copy-pasta from above, that's all.

+                android:textAppearance="@style/PreferenceFloatLabelTextAppearance"
+                android:text="@string/autofill_credit_card_editor_billing_address"
+                android:paddingStart="@dimen/pref_autofill_field_horizontal_padding"
+                android:paddingEnd="@dimen/pref_autofill_field_horizontal_padding" />
+
+            <Spinner
+                android:id="@+id/autofill_credit_card_editor_billing_address_spinner"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+            <View style="@style/PreferenceSpinnerUnderlineView"  />
         </LinearLayout>
 
         <Space style="@style/ButtonBarTopSpacer" />
         <View style="@style/ButtonBarTopDivider" />
 
         <LinearLayout style="@style/ButtonBar" >
             <Button
                 android:id="@+id/autofill_credit_card_delete"
                 style="@style/ButtonBarButton"
                 android:text="@string/delete" />
 
             <Button
                 android:id="@+id/autofill_credit_card_cancel"
                 style="@style/ButtonBarButton"
                 android:text="@string/cancel" />
 
             <Button
                 android:id="@+id/autofill_credit_card_save"
                 style="@style/ButtonBarButton"
                 android:text="@string/save" />
         </LinearLayout>
     </LinearLayout>
 
 </ScrollView>