Hide docked windows behind a flag

ash/wm/dock/docked_window_resizer_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_resizer.h"
 
 #include "ash/aura/wm_window_aura.h"
+#include "ash/common/ash_switches.h"
 #include "ash/common/shelf/shelf_widget.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/test/test_shelf_delegate.h"
 #include "ash/common/wm/dock/docked_window_layout_manager.h"
 #include "ash/common/wm/panels/panel_layout_manager.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm_shell.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/public/cpp/shelf_types.h"
@@ skipping 22 matching lines @@
 namespace ash {
 
 class DockedWindowResizerTest
     : public test::AshTestBase,
       public testing::WithParamInterface<ui::wm::WindowType> {
  public:
   DockedWindowResizerTest() : window_type_(GetParam()) {}
   virtual ~DockedWindowResizerTest() {}
 
   void SetUp() override {
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        ash::switches::kAshEnableDockedWindows);
     AshTestBase::SetUp();
     UpdateDisplay("600x400");
   }
 
   void TearDown() override { AshTestBase::TearDown(); }
 
  protected:
   enum DockedEdge {
     DOCKED_EDGE_NONE,
     DOCKED_EDGE_LEFT,
@@ skipping 1432 matching lines @@
   EXPECT_TRUE(window_state->IsMaximized());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowResizerTest,
                         testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                         ui::wm::WINDOW_TYPE_PANEL));
 
 }  // namespace ash