ash: Start/stop observing KeyboardController via ShellObserver

ash/common/wm/workspace/workspace_layout_manager.h

 // Copyright (c) 2012 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_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 #define ASH_COMMON_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 
 #include <memory>
 #include <set>
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
 #include "ash/common/wm/window_state_observer.h"
 #include "ash/common/wm/wm_types.h"
 #include "ash/common/wm_layout_manager.h"
 #include "base/macros.h"
+#include "base/scoped_observer.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 RootWindowController;
 class WmShell;
 class WmWindow;
 class WorkspaceLayoutManagerBackdropDelegate;
 
 namespace wm {
 class WMEvent;
 }
@@ skipping 52 matching lines @@
                                    wm::WindowStateType old_type) override;
 
   // display::DisplayObserver overrides:
   void OnDisplayMetricsChanged(const display::Display& display,
                                uint32_t changed_metrics) override;
 
   // ShellObserver overrides:
   void OnFullscreenStateChanged(bool is_fullscreen,
                                 WmWindow* root_window) override;
   void OnPinnedStateChanged(WmWindow* pinned_window) override;
+  void OnVirtualKeyboardStateChanged(bool activated,
+                                     WmWindow* root_window) override;
 
  private:
   typedef std::set<WmWindow*> WindowSet;
 
   // Adjusts the bounds of all managed windows when the display area changes.
   // This happens when the display size, work area insets has changed.
   // If this is called for a display size change (i.e. |event|
   // is DISPLAY_RESIZED), the non-maximized/non-fullscreen
   // windows are readjusted to make sure the window is completely within the
   // display region. Otherwise, it makes sure at least some parts of the window
@@ skipping 22 matching lines @@
   // The work area in the coordinates of |window_|.
   gfx::Rect work_area_in_parent_;
 
   // True if this workspace is currently in fullscreen mode.
   bool is_fullscreen_;
 
   // A window which covers the full container and which gets inserted behind the
   // topmost visible window.
   std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate> backdrop_delegate_;
 
+  ScopedObserver<keyboard::KeyboardController,
+                 keyboard::KeyboardControllerObserver>
+      keyboard_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_