Wires up drags to pointer watcher adapter.

ash/shared/immersive_context.h

Index: ash/shared/immersive_context.h
diff --git a/ash/shared/immersive_context.h b/ash/shared/immersive_context.h
index 6ed6a284afd9118fa663d6a5dbb94379dda819ce..9e8041de3d86f55e2c03013633be5fc66c54697d 100644
--- a/ash/shared/immersive_context.h
+++ b/ash/shared/immersive_context.h
@@ -12,6 +12,7 @@ class Rect;
 }
 namespace views {
 class PointerWatcher;
+enum class PointerWatcherEventTypes;
 class Widget;
 }
 
@@ -48,7 +49,7 @@ class ASH_EXPORT ImmersiveContext {
 
   // See WmShell::AddPointerWatcher for details.
   virtual void AddPointerWatcher(views::PointerWatcher* watcher,
-                                 bool wants_moves) = 0;
+                                 views::PointerWatcherEventTypes events) = 0;
   virtual void RemovePointerWatcher(views::PointerWatcher* watcher) = 0;
 
   // Returns true if any window has capture.