Touch gestures for System Tray/ IME/ Stylus/ Notifications

ash/system/ime_menu/ime_menu_tray.h

Index: ash/system/ime_menu/ime_menu_tray.h
diff --git a/ash/system/ime_menu/ime_menu_tray.h b/ash/system/ime_menu/ime_menu_tray.h
index ac4f37619a048d995311eeaba51a0e2b76856a77..93d4948be2d2454a41b1a201ea033cbf311daa3b 100644
--- a/ash/system/ime_menu/ime_menu_tray.h
+++ b/ash/system/ime_menu/ime_menu_tray.h
@@ -63,6 +63,13 @@ class ASH_EXPORT ImeMenuTray : public TrayBackgroundView,
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
   void ClickedOutsideBubble() override;
   bool PerformAction(const ui::Event& event) override;
+  bool HasBubble() override;
+  void CloseBubble() override;
+  void ShowBubble() override;
+  views::TrayBubbleView* GetBubbleView() override;
+
+  // ui::EventHandler:

[msw, 2017/07/12 05:04:51]

nit: Since this interface is inherited via the subclassing of
TrayBackgroundView, you can remove this comment and combine this override into
the block above.

[minch1, 2017/07/13 19:10:35]

Done.

+  void OnGestureEvent(ui::GestureEvent* event) override;
 
   // IMEObserver:
   void OnIMERefresh() override;
@@ -79,6 +86,7 @@ class ASH_EXPORT ImeMenuTray : public TrayBackgroundView,
   base::string16 GetAccessibleNameForBubble() override;
   bool ShouldEnableExtraKeyboardAccessibility() override;
   void HideBubble(const views::TrayBubbleView* bubble_view) override;
+  bool ProcessGestureEventForBubble(ui::GestureEvent* event) override;
 
   // keyboard::KeyboardControllerObserver:
   void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;