Use dropdown list for admin areas in pr form.

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

 // 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.
 
 package org.chromium.chrome.browser.payments.ui;
 
 import android.text.TextUtils;
 import android.util.Pair;
 
 import org.chromium.base.Callback;
@@ skipping 180 matching lines @@
         assert label != null;
         assert iconIds != null;
         assert descIds != null;
         EditorFieldModel result = new EditorFieldModel(INPUT_TYPE_HINT_ICONS);
         result.mLabel = label;
         result.mIconResourceIds = iconIds;
         result.mIconDescriptionsForAccessibility = descIds;
         return result;
     }
 
+    /** Constructs a dropdown field model. */
+    public static EditorFieldModel createDropdown() {
+        return new EditorFieldModel(INPUT_TYPE_HINT_DROPDOWN);
+    }
+
     /**
      * Constructs a dropdown field model.
      *
      * @param label             The human-readable label for user to understand the type of data
      *                          that should be entered into this field.
      * @param dropdownKeyValues The keyed values to display in the dropdown.
      * @param hint              The optional hint to be displayed when no value is selected.
      */
     public static EditorFieldModel createDropdown(
             @Nullable CharSequence label, List<DropdownKeyValue> dropdownKeyValues,
@@ skipping 114 matching lines @@
         assert isTextField();
         return mActionIconAction;
     }
 
     /** @return The value icon generator or null if not exist. */
     public EditorValueIconGenerator getValueIconGenerator() {
         assert isTextField();
         return mValueIconGenerator;
     }
 
-    private boolean isTextField() {
+    /** @return Whether the input is a text field. */
+    public boolean isTextField() {
         return mInputTypeHint >= INPUT_TYPE_HINT_MIN_INCLUSIVE
                 && mInputTypeHint < INPUT_TYPE_HINT_MAX_TEXT_INPUT_EXCLUSIVE;
     }
 
+    /** @return Whether the input is a dropdown field. */
+    public boolean isDropdownField() {
+        return mInputTypeHint == INPUT_TYPE_HINT_DROPDOWN;
+    }
+
     /** @return The type of input, for example, INPUT_TYPE_HINT_PHONE. */
     public int getInputTypeHint() {
         return mInputTypeHint;
     }
 
     /** @return Whether the checkbox is checked. */
     public boolean isChecked() {
         assert mInputTypeHint == INPUT_TYPE_HINT_CHECKBOX;
         return ContextUtils.getAppSharedPreferences().getBoolean(mValue.toString(), true);
     }
@@ skipping 189 matching lines @@
     /**
      * Sets whether this input field should take up the full line. All fields take up the full line
      * by default.
      *
      * @param isFullLine Whether the input field should take up the full line.
      */
     public void setIsFullLine(boolean isFullLine) {
         mIsFullLine = isFullLine;
     }
 }