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 cbec88f4bf3d07554d355b0bf828ed0fe9aa3b49..5ef9f7f0eeb5155266a1fb8407a9532c41a798e1 100644
--- a/services/ui/ws/window_manager_state.cc
+++ b/services/ui/ws/window_manager_state.cc
@@ -242,8 +242,8 @@ 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_awaiting_input_ack_, user_id(),
-                                          nullptr);
+    window_server()->SendToPointerWatchers(*event_awaiting_input_ack_,
+                                           user_id(), nullptr);
     ProcessNextEventFromQueue();
   }
 }
@@ -355,7 +355,7 @@ 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);
 }
@@ -527,8 +527,8 @@ 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