mus: Implement Window Server Capture

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

Index: components/mus/public/cpp/lib/view_tree_client_impl.cc
diff --git a/components/mus/public/cpp/lib/view_tree_client_impl.cc b/components/mus/public/cpp/lib/view_tree_client_impl.cc
index 43a19353c72494b9515bdac7bf988dc550fef84a..cc7a54520a9783771dc6d6d44e104d025d8c9b93 100644
--- a/components/mus/public/cpp/lib/view_tree_client_impl.cc
+++ b/components/mus/public/cpp/lib/view_tree_client_impl.cc
@@ -144,6 +144,13 @@ void ViewTreeClientImpl::SetBounds(Id view_id, const mojo::Rect& bounds) {
   tree_->SetViewBounds(view_id, bounds.Clone(), ActionCompletedCallback());
 }
 
+void ViewTreeClientImpl::SetCapture(Id view_id) {
+  // In order for us to get here we had to have exposed a view, which implies we
+  // got a connection.
+  DCHECK(tree_);
+  tree_->SetCapture(view_id, ActionCompletedCallback());
+}
+
 void ViewTreeClientImpl::SetFocus(Id view_id) {
   // In order for us to get here we had to have exposed a view, which implies we
   // got a connection.
@@ -295,6 +302,14 @@ void ViewTreeClientImpl::OnUnembed() {
   delete this;
 }
 
+void ViewTreeClientImpl::OnLostCapture(Id view_id) {
+  View* view = GetViewById(view_id);
+  if (view) {
+    FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(view).observers(),
+                      OnViewLostCapture(view));
+  }
+}
+
 void ViewTreeClientImpl::OnViewBoundsChanged(Id view_id,
                                              mojo::RectPtr old_bounds,
                                              mojo::RectPtr new_bounds) {