Remove docked windows entirely in M59.

ash/common/wm/mru_window_tracker_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 "ash/common/wm/mru_window_tracker.h"
 
 #include "ash/common/test/ash_test.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
@@ skipping 83 matching lines @@
 // Tests that windows being dragged are only in the WindowList once.
 TEST_F(MruWindowTrackerTest, DraggedWindowsInListOnlyOnce) {
   std::unique_ptr<WindowOwner> w1_owner(CreateTestWindow());
   WmWindow* w1 = w1_owner->window();
   w1->Activate();
 
   // Start dragging the window.
   w1->GetWindowState()->CreateDragDetails(
       gfx::Point(), HTRIGHT, aura::client::WINDOW_MOVE_SOURCE_TOUCH);
 
-  // During a drag the window is reparented by the Docked container.
-  WmWindow* drag_container = w1->GetRootWindow()->GetChildByShellWindowId(
-      kShellWindowId_DockedContainer);
-  drag_container->AddChild(w1);
-  EXPECT_TRUE(w1->GetWindowState()->is_dragged());
-
   // The dragged window should only be in the list once.
   WmWindow::Windows window_list =
       mru_window_tracker()->BuildWindowListIgnoreModal();
   EXPECT_EQ(1, std::count(window_list.begin(), window_list.end(), w1));
 }
 
 }  // namespace ash