Remove old (dead) app list code.

ui/app_list/test/app_list_test_view_delegate.cc

 // 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.
 
 #include "ui/app_list/test/app_list_test_view_delegate.h"
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 82 matching lines @@
 #endif
 
 bool AppListTestViewDelegate::IsSpeechRecognitionEnabled() {
   return false;
 }
 
 const AppListViewDelegate::Users& AppListTestViewDelegate::GetUsers() const {
   return users_;
 }
 
-bool AppListTestViewDelegate::ShouldCenterWindow() const {
-  return app_list::switches::IsCenteredAppListEnabled();
-}
-
 void AppListTestViewDelegate::ReplaceTestModel(int item_count) {
   model_.reset(new AppListTestModel);
   model_->PopulateApps(item_count);
 }
 
 void AppListTestViewDelegate::AddObserver(
     AppListViewDelegateObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void AppListTestViewDelegate::RemoveObserver(
     AppListViewDelegateObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace test
 }  // namespace app_list