Add support for datalist to text input element on Android

ui/android/java/src/org/chromium/ui/autofill/AutofillListAdapter.java

 // Copyright 2013 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.ui.autofill;
 
 import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Color;
+import android.graphics.drawable.LayerDrawable;
 import android.text.TextUtils;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.AbsListView.LayoutParams;
 import android.widget.ArrayAdapter;
 import android.widget.TextView;
 
 import org.chromium.ui.R;
 
+import org.chromium.base.ApiCompatibilityUtils;
+
 import java.util.ArrayList;
+import java.util.Set;
 
 /**
  * Autofill suggestion adapter for AutofillWindow.
  */
 public class AutofillListAdapter extends ArrayAdapter<AutofillSuggestion> {
     private Context mContext;
+    private Set<Integer> mSeparators;
 
-    AutofillListAdapter(Context context, ArrayList<AutofillSuggestion> objects) {
+    AutofillListAdapter(Context context,
+                        ArrayList<AutofillSuggestion> objects,
+                        Set<Integer> separators) {
         super(context, R.layout.autofill_text, objects);
+        mSeparators = separators;
         mContext = context;
     }
 
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         View layout = convertView;
         if (convertView == null) {
             LayoutInflater inflater =
                     (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             layout = inflater.inflate(R.layout.autofill_text, null);
+            ApiCompatibilityUtils.setBackgroundForView(layout, new AutofillDividerDrawable());
         }
         TextView labelView = (TextView) layout.findViewById(R.id.autofill_label);
         labelView.setText(getItem(position).mLabel);
 
+        AutofillDividerDrawable divider = (AutofillDividerDrawable) layout.getBackground();
+        int height = mContext.getResources().getDimensionPixelSize(R.dimen.autofill_text_height);
+        if (position == 0) {
+            divider.setColor(Color.TRANSPARENT);
+        } else {
+            int dividerHeight = mContext.getResources().getDimensionPixelSize(
+                    R.dimen.autofill_text_divider_height);
+            height += dividerHeight;
+            divider.setHeight(dividerHeight);
+            if (mSeparators.contains(position)) {
+                divider.setColor(mContext.getResources().getColor(
+                                 R.color.autofill_dark_divider_color));
+            } else {
+                divider.setColor(mContext.getResources().getColor(
+                                 R.color.autofill_divider_color));
+            }
+        }
+        layout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, height));
+
         TextView sublabelView = (TextView) layout.findViewById(R.id.autofill_sublabel);
         CharSequence sublabel = getItem(position).mSublabel;
         if (TextUtils.isEmpty(sublabel)) {
             sublabelView.setVisibility(View.GONE);
         } else {
             sublabelView.setText(sublabel);
             sublabelView.setVisibility(View.VISIBLE);
         }
 
         return layout;
     }
 }