Add virtual keyboard item into opt-in IME menu.

ash/common/system/chromeos/ime_menu/ime_menu_tray.h

 // 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.
 
 #ifndef ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_
 
 #include "ash/ash_export.h"
+#include "ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_observer.h"
 #include "ash/common/system/ime/ime_observer.h"
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/tray_background_view.h"
 #include "ash/common/system/tray/tray_bubble_wrapper.h"
 #include "base/macros.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 
 namespace views {
 class Label;
 }  // namespace views
 
 namespace ash {
 class ImeListView;
 class StatusAreaWidget;
 class WmWindow;
 
 // The tray item for IME menu, which shows the detailed view of a null single
 // item.
 class ASH_EXPORT ImeMenuTray : public TrayBackgroundView,
                                public IMEObserver,
                                public views::TrayBubbleView::Delegate,
-                               public keyboard::KeyboardControllerObserver {
+                               public keyboard::KeyboardControllerObserver,
+                               public VirtualKeyboardObserver {
  public:
   explicit ImeMenuTray(WmShelf* wm_shelf);
   ~ImeMenuTray() override;
 
   // Shows the IME menu bubble and highlights the button.
   void ShowImeMenuBubble();
 
   // Hides the IME menu bubble and lowlights the button.
   void HideImeMenuBubble();
 
   // Returns true if the IME menu bubble has been shown.
   bool IsImeMenuBubbleShown();
 
   // Shows the virtual keyboard with the given keyset: emoji, handwriting or
   // voice.
   void ShowKeyboardWithKeyset(const std::string& keyset);
 
   // Returns true if it should block the auto hide behavior of the shelf.
   bool ShouldBlockShelfAutoHide() const;
 
+  // Returns whether the virtual keyboard toggle should be shown in the
+  // detailed view.
+  bool ShouldShowKeyboardToggle() const;
+
   // TrayBackgroundView:
   void SetShelfAlignment(ShelfAlignment alignment) override;
   base::string16 GetAccessibleNameForTray() override;
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
   void ClickedOutsideBubble() override;
   bool PerformAction(const ui::Event& event) override;
 
   // IMEObserver:
   void OnIMERefresh() override;
   void OnIMEMenuActivationChanged(bool is_activated) override;
@@ skipping 10 matching lines @@
       views::Widget* anchor_widget,
       views::Widget* bubble_widget,
       views::Widget::InitParams* params) const override;
   void HideBubble(const views::TrayBubbleView* bubble_view) override;
 
   // keyboard::KeyboardControllerObserver:
   void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;
   void OnKeyboardClosed() override;
   void OnKeyboardHidden() override;
 
+  // VirtualKeyboardObserver.
+  void OnKeyboardSuppressionChanged(bool suppressed) override;
+
  private:
   // To allow the test class to access |label_|.
   friend class ImeMenuTrayTest;
 
   // Updates the text of the label on the tray.
   void UpdateTrayLabel();
 
   // Bubble for default and detailed views.
   std::unique_ptr<TrayBubbleWrapper> bubble_;
   ImeListView* ime_list_view_;
 
   views::Label* label_;
   IMEInfo current_ime_;
   bool show_keyboard_;
   bool force_show_keyboard_;
   bool should_block_shelf_auto_hide_;
+  bool keyboard_suppressed_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeMenuTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_