ash: Start/stop observing KeyboardController via ShellObserver

ash/common/wm/dock/docked_window_layout_manager.h

 // 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.
 
 #ifndef ASH_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 #define ASH_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
 #include "ash/common/wm/dock/dock_types.h"
 #include "ash/common/wm/dock/docked_window_layout_manager_observer.h"
 #include "ash/common/wm/window_state_observer.h"
 #include "ash/common/wm/wm_snap_to_pixel_layout_manager.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
+#include "base/scoped_observer.h"
 #include "base/time/time.h"
 #include "ui/aura/window_observer.h"
 #include "ui/display/display_observer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
+namespace keyboard {
+class KeyboardController;
+}
+
 namespace ash {
 class DockedBackgroundWidget;
 class DockedWindowLayoutManagerObserver;
 class DockedWindowResizerTest;
 class RootWindowController;
 class WmShelf;
 
 // DockedWindowLayoutManager is responsible for organizing windows when they are
 // docked to the side of a screen. It is associated with a specific container
 // window (i.e. kShellWindowId_DockedContainer) and controls the layout of any
@@ skipping 118 matching lines @@
   void OnWindowActivated(ActivationReason reason,
                          aura::Window* gained_active,
                          aura::Window* lost_active) override;
 
   // ShellObserver:
   void OnShelfAlignmentChanged(WmWindow* root_window) override;
   void OnFullscreenStateChanged(bool is_fullscreen,
                                 WmWindow* root_window) override;
   void OnOverviewModeStarting() override;
   void OnOverviewModeEnded() override;
+  void OnVirtualKeyboardStateChanged(bool activated,
+                                     WmWindow* root_window) override;
 
  private:
   struct CompareMinimumHeight;
   struct CompareWindowPos;
   class ShelfWindowObserver;
   struct WindowWithHeight;
 
   friend class DockedWindowLayoutManagerTest;
   friend class DockedWindowResizerTest;
 
@@ skipping 134 matching lines @@
 
   // Observes shelf for bounds changes.
   std::unique_ptr<ShelfWindowObserver> shelf_observer_;
 
   // Widget used to paint a background for the docked area.
   std::unique_ptr<DockedBackgroundWidget> background_widget_;
 
   // Observers of dock bounds changes.
   base::ObserverList<DockedWindowLayoutManagerObserver> observer_list_;
 
+  ScopedObserver<keyboard::KeyboardController,
+                 keyboard::KeyboardControllerObserver>
+      keyboard_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(DockedWindowLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_