AppListTestViewDelegate::ShouldCenterWindow returns the proper value.

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 "base/callback.h"
 #include "base/files/file_path.h"
 #include "ui/app_list/app_list_model.h"
+#include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/signin_delegate.h"
 #include "ui/app_list/test/app_list_test_model.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace app_list {
 namespace test {
 
 class TestSigninDelegate : public SigninDelegate {
  public:
@@ skipping 101 matching lines @@
 
 content::WebContents* AppListTestViewDelegate::GetSpeechRecognitionContents() {
   return NULL;
 }
 
 const AppListViewDelegate::Users& AppListTestViewDelegate::GetUsers() const {
   return users_;
 }
 
 bool AppListTestViewDelegate::ShouldCenterWindow() const {
-  return false;
+  return app_list::switches::IsCenteredAppListEnabled();

[Matt Giuca, 2014/05/12 06:30:38]

Note: To understand what this is doing, have a look in
ash/wm/app_list_controller_unittest. It sets the kEnableCenteredAppList switch,
which previously had no effect due to this method returning false in tests (so
it would run all the tests twice with the non-centered app list).

 }
 
 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