mus: Change PointerWatcher to observe all pointer events, with moves optional.

ash/common/shelf/shelf_tooltip_manager.h

Index: ash/common/shelf/shelf_tooltip_manager.h
diff --git a/ash/common/shelf/shelf_tooltip_manager.h b/ash/common/shelf/shelf_tooltip_manager.h
index 2bc6943dc0df3b979c1421a202d7ad326515e304..c68a1b075de0c93b7f7a61b5ed8d37b595f8e4fc 100644
--- a/ash/common/shelf/shelf_tooltip_manager.h
+++ b/ash/common/shelf/shelf_tooltip_manager.h
@@ -58,12 +58,9 @@ class ASH_EXPORT ShelfTooltipManager : public ui::EventHandler,
   void OnMouseEvent(ui::MouseEvent* event) override;
 
   // views::PointerWatcher overrides:
-  void OnMousePressed(const ui::MouseEvent& event,
-                      const gfx::Point& location_in_screen,
-                      views::Widget* target) override;
-  void OnTouchPressed(const ui::TouchEvent& event,
-                      const gfx::Point& location_in_screen,
-                      views::Widget* target) override;
+  void OnPointerEventObserved(const ui::PointerEvent& event,
+                              const gfx::Point& location_in_screen,
+                              views::Widget* target) override;
 
   // WmShelfObserver overrides:
   void WillChangeVisibilityState(ShelfVisibilityState new_state) override;