Moves WorkspaceController to ash/common

ash/mus/root_window_controller.cc

 // Copyright 2016 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/mus/root_window_controller.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 64 matching lines @@
     window_manager_->window_manager_client()->AddActivationParent(
         GetWindowByShellWindowId(kActivatableShellWindowIds[i])->mus_window());
   }
 
   WmWindowMus* always_on_top_container =
       GetWindowByShellWindowId(kShellWindowId_AlwaysOnTopContainer);
   always_on_top_controller_.reset(
       new AlwaysOnTopController(always_on_top_container));
 }
 
-RootWindowController::~RootWindowController() {}
+RootWindowController::~RootWindowController() {
+  root_window_controller_common_->DeleteWorkspaceController();
+}
 
 shell::Connector* RootWindowController::GetConnector() {
   return window_manager_->connector();
 }
 
 ui::Window* RootWindowController::NewTopLevelWindow(
     std::map<std::string, std::vector<uint8_t>>* properties) {
   // TODO(sky): panels need a different frame, http:://crbug.com/614362.
   const bool provide_non_client_frame =
       GetWindowType(*properties) == ui::mojom::WindowType::WINDOW ||
@@ skipping 111 matching lines @@
       base::MakeUnique<DockedWindowLayoutManager>(docked_container));
 
   WmWindowMus* panel_container =
       GetWindowByShellWindowId(kShellWindowId_PanelContainer);
   panel_container->SetLayoutManager(
       base::MakeUnique<PanelLayoutManager>(panel_container));
 }
 
 }  // namespace mus
 }  // namespace ash