Remove more dead app list code.

ui/app_list/views/app_list_main_view_unittest.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/views/app_list_main_view.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 274 matching lines @@
 
   generator.MoveMouseTo(item1->GetBoundsInScreen().CenterPoint());
   EXPECT_FALSE(item0->is_highlighted());
   EXPECT_TRUE(item1->is_highlighted());
 
   generator.MoveMouseTo(gfx::Point(-1, -1));
   EXPECT_FALSE(item0->is_highlighted());
   EXPECT_FALSE(item1->is_highlighted());
 }
 
-// No touch on desktop Mac. Tracked in http://crbug.com/445520.
-#if defined(OS_MACOSX) && !defined(USE_AURA)
-#define MAYBE_TapGestureToHighlight DISABLED_TapGestureToHighlight
-#else
-#define MAYBE_TapGestureToHighlight TapGestureToHighlight
-#endif
-
 // Tests that tap gesture on app item highlights it
-TEST_F(AppListMainViewTest, MAYBE_TapGestureToHighlight) {
+TEST_F(AppListMainViewTest, TapGestureToHighlight) {
   delegate_->GetTestModel()->PopulateApps(1);
   main_widget_->Show();
 
   ui::test::EventGenerator generator(GetContext(),
                                      main_widget_->GetNativeWindow());
   AppListItemView* item = RootViewModel()->view_at(0);
 
   // Switch to All Apps page.
   GetContentsView()->SetActiveState(AppListModel::STATE_APPS);
   GetContentsView()->Layout();
@@ skipping 135 matching lines @@
   // The app list model should remain unchanged.
   EXPECT_EQ(1, FolderViewModel()->view_size());
   EXPECT_EQ(2, RootViewModel()->view_size());
   EXPECT_EQ(folder_id, RootGridView()->GetItemViewAt(0)->item()->id());
   EXPECT_NE(nullptr,
             delegate_->GetTestModel()->FindFolderItem("single_item_folder"));
 }
 
 }  // namespace test
 }  // namespace app_list