Purge the App Launcher code from Windows.

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 189 matching lines @@
     AppListItemView* folder_item_view =
         static_cast<AppListItemView*>(RootViewModel()->view_at(0));
     EXPECT_EQ(folder_item_view->item(), folder_item);
 
     // Click on the folder to open it.
     EXPECT_FALSE(FolderView()->visible());
     SimulateClick(folder_item_view);
     base::RunLoop().RunUntilIdle();
     EXPECT_TRUE(FolderView()->visible());
 
-#if defined(OS_WIN)
-    AppsGridViewTestApi folder_grid_view_test_api(FolderGridView());
-    folder_grid_view_test_api.DisableSynchronousDrag();
-#endif
     return folder_item_view;
   }
 
   AppListItemView* StartDragForReparent(int index_in_folder) {
     // Start to drag the item in folder.
     views::View* item_view = FolderViewModel()->view_at(index_in_folder);
     gfx::Point point = item_view->bounds().CenterPoint();
     AppListItemView* dragged =
         SimulateInitiateDrag(FolderGridView(), AppsGridView::MOUSE, point);
     EXPECT_EQ(item_view, dragged);
@@ skipping 233 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