Use View Holder pattern in AccountsAdapter.getView().

remoting/android/java/src/org/chromium/chromoting/AccountsAdapter.java

 // 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.
 
 package org.chromium.chromoting;
 
 import android.accounts.Account;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.TextView;
 
 /** SpinnerAdapter class used for the ActionBar accounts spinner. */
 public class AccountsAdapter extends ArrayAdapter<Account> {
     private LayoutInflater mInflater;
 
     public AccountsAdapter(Context context, Account[] accounts) {
         // ArrayAdapter only uses the |resource| parameter to return a View from getView() and
         // getDropDownView(). But these methods are overridden here to return custom Views, so it's
         // OK to provide 0 as the resource for the base class.
         super(context, 0, accounts);
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     }
 
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
-        View view = mInflater.inflate(R.layout.account_selected, parent, false);
+        View view = convertView;
+        if (view == null) {
+            view = mInflater.inflate(R.layout.account_selected, parent, false);
+        }
         Account account = getItem(position);
         TextView target = (TextView) view.findViewById(R.id.account_name);
         target.setText(account.name);
         return view;
     }
 
     @Override
     public View getDropDownView(int position, View convertView, ViewGroup parent) {
         TextView view = (TextView) mInflater.inflate(R.layout.account_dropdown, parent, false);
         Account account = getItem(position);
         view.setText(account.name);
         return view;
     }
 }