Hide docked windows behind a flag

ash/wm/dock/docked_window_layout_manager_unittest.cc

 // Copyright (c) 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 "ash/common/wm/dock/docked_window_layout_manager.h"
 
 #include "ash/aura/wm_window_aura.h"
+#include "ash/common/ash_switches.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/test/test_shelf_delegate.h"
 #include "ash/common/wm/panels/panel_layout_manager.h"
 #include "ash/common/wm/window_resizer.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/shelf_view_test_api.h"
 #include "ash/test/shell_test_api.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
+#include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "services/ui/public/interfaces/window_manager_constants.mojom.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/hit_test.h"
 #include "ui/display/display_layout.h"
 #include "ui/display/manager/display_manager.h"
 #include "ui/display/screen.h"
 #include "ui/display/test/display_manager_test_api.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 
 class DockedWindowLayoutManagerTest
     : public test::AshTestBase,
       public testing::WithParamInterface<ui::wm::WindowType> {
  public:
   DockedWindowLayoutManagerTest() : window_type_(GetParam()) {}
   virtual ~DockedWindowLayoutManagerTest() {}
 
   void SetUp() override {
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        ash::switches::kAshEnableDockedWindows);
     AshTestBase::SetUp();
     UpdateDisplay("600x600");
 
     shelf_view_test_.reset(new test::ShelfViewTestAPI(
         GetPrimaryShelf()->GetShelfViewForTesting()));
     shelf_view_test_->SetAnimationDuration(1);
   }
 
  protected:
   enum DockedEdge {
@@ skipping 743 matching lines @@
   EXPECT_EQ(work_area.height(), window->GetBoundsInScreen().height());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowLayoutManagerTest,
                         testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                         ui::wm::WINDOW_TYPE_PANEL));
 
 }  // namespace ash