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

services/ui/public/cpp/tests/test_window_tree.h

Index: services/ui/public/cpp/tests/test_window_tree.h
diff --git a/services/ui/public/cpp/tests/test_window_tree.h b/services/ui/public/cpp/tests/test_window_tree.h
index d1f238dfbb5eb40c0d6d2b92d569e0b53c69303a..8027ebc24465cba8ca6c6e99532cca90b221f4d6 100644
--- a/services/ui/public/cpp/tests/test_window_tree.h
+++ b/services/ui/public/cpp/tests/test_window_tree.h
@@ -78,8 +78,9 @@ class TestWindowTree : public mojom::WindowTree {
                      const GetWindowTreeCallback& callback) override;
   void SetCapture(uint32_t change_id, uint32_t window_id) override;
   void ReleaseCapture(uint32_t change_id, uint32_t window_id) override;
-  void SetEventObserver(mojom::EventMatcherPtr matcher,
-                        uint32_t observer_id) override;
+  void StartPointerWatcher(bool want_moves,
+                           uint32_t pointer_watcher_id) override;
+  void StopPointerWatcher() override;
   void Embed(uint32_t window_id,
              mojom::WindowTreeClientPtr client,
              uint32_t flags,