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

services/ui/ws/window_manager_state.cc

Index: services/ui/ws/window_manager_state.cc
diff --git a/services/ui/ws/window_manager_state.cc b/services/ui/ws/window_manager_state.cc
index f36ede01c8f64ed1d2d929863ee7c9650d5a0715..83797a6793e2a13d3be228b34748966a0b0eac07 100644
--- a/services/ui/ws/window_manager_state.cc
+++ b/services/ui/ws/window_manager_state.cc
@@ -241,7 +241,7 @@ void WindowManagerState::OnAcceleratorAck(mojom::EventResult result) {
   } else {
     // We're not going to process the event any further, notify event observers.
     // We don't do this first to ensure we don't send an event twice to clients.
-    window_server()->SendToEventObservers(*event, user_id(), nullptr);
+    window_server()->SendToPointerWatchers(*event, user_id(), nullptr);
     ProcessNextEventFromQueue();
   }
 }
@@ -359,7 +359,7 @@ void WindowManagerState::DispatchInputEventToWindowImpl(
   }
 
   // Ignore |tree| because it will receive the event via normal dispatch.
-  window_server()->SendToEventObservers(event, user_id(), tree);
+  window_server()->SendToPointerWatchers(event, user_id(), tree);
 
   tree->DispatchInputEvent(target, event);
 }
@@ -535,8 +535,8 @@ ServerWindow* WindowManagerState::GetRootWindowContaining(
 }
 
 void WindowManagerState::OnEventTargetNotFound(const ui::Event& event) {
-  window_server()->SendToEventObservers(event, user_id(),
-                                        nullptr /* ignore_tree */);
+  window_server()->SendToPointerWatchers(event, user_id(),
+                                         nullptr /* ignore_tree */);
 }
 
 }  // namespace ws