mus Window Server: implement event capture

components/mus/public/cpp/lib/window_tree_client_impl.cc

Index: components/mus/public/cpp/lib/window_tree_client_impl.cc
diff --git a/components/mus/public/cpp/lib/window_tree_client_impl.cc b/components/mus/public/cpp/lib/window_tree_client_impl.cc
index 8e1907ae196bac1e9d9dc4d0e7d95223f5f14fb0..3634fe11ceef8b752976e771fc50d493fb5425ed 100644
--- a/components/mus/public/cpp/lib/window_tree_client_impl.cc
+++ b/components/mus/public/cpp/lib/window_tree_client_impl.cc
@@ -243,6 +243,14 @@ void WindowTreeClientImpl::SetBounds(Window* window,
   tree_->SetWindowBounds(change_id, window->id(), mojo::Rect::From(bounds));
 }
 
+void WindowTreeClientImpl::SetCapture(Window* window) {
+  NOTIMPLEMENTED();
+}
+
+void WindowTreeClientImpl::ReleaseCapture(Window* window) {
+  NOTIMPLEMENTED();
+}
+
 void WindowTreeClientImpl::SetClientArea(
     Id window_id,
     const gfx::Insets& client_area,
@@ -554,6 +562,10 @@ void WindowTreeClientImpl::OnUnembed(Id window_id) {
   WindowPrivate(window).LocalDestroy();
 }
 
+void WindowTreeClientImpl::OnLostCapture(Id window_id) {
+  NOTIMPLEMENTED();
+}
+
 void WindowTreeClientImpl::OnTopLevelCreated(uint32_t change_id,
                                              mojom::WindowDataPtr data) {
   // The server ack'd the top level window we created and supplied the state