Remove docked windows entirely in M59.

ash/common/shelf/shelf_window_watcher_unittest.cc

Index: ash/common/shelf/shelf_window_watcher_unittest.cc
diff --git a/ash/common/shelf/shelf_window_watcher_unittest.cc b/ash/common/shelf/shelf_window_watcher_unittest.cc
index 9634e82152679f37e785565275dc99f2746d3788..9a3dc99392959ae06b4241d43872b5bd0731db40 100644
--- a/ash/common/shelf/shelf_window_watcher_unittest.cc
+++ b/ash/common/shelf/shelf_window_watcher_unittest.cc
@@ -243,14 +243,6 @@ TEST_F(ShelfWindowWatcherTest, DockWindow) {
       root_window->GetChildByShellWindowId(kShellWindowId_DefaultContainer);
   EXPECT_EQ(default_container, window->GetParent());
 
-  WmWindow* docked_container =
-      root_window->GetChildByShellWindowId(kShellWindowId_DockedContainer);
-
-  // Check |window|'s item is not removed when it is re-parented to the dock.
-  docked_container->AddChild(window);
-  EXPECT_EQ(docked_container, window->GetParent());
-  EXPECT_EQ(2, model_->item_count());
-
   // The shelf item is removed when the window is closed, even if it is in the
   // docked container at the time.
   widget.reset();