Makes NewWindow() take set of properties for window

components/mus/public/cpp/tests/test_window_tree.cc

Index: components/mus/public/cpp/tests/test_window_tree.cc
diff --git a/components/mus/public/cpp/tests/test_window_tree.cc b/components/mus/public/cpp/tests/test_window_tree.cc
index 3e89776b7eaf7f2d9d5db0a3d073487b7f2453f0..a43d3588b9ffb4d85e9b75170194512f65b0f161 100644
--- a/components/mus/public/cpp/tests/test_window_tree.cc
+++ b/components/mus/public/cpp/tests/test_window_tree.cc
@@ -20,7 +20,10 @@ bool TestWindowTree::GetAndClearChangeId(uint32_t* change_id) {
   return true;
 }
 
-void TestWindowTree::NewWindow(uint32_t change_id, uint32_t window_id) {}
+void TestWindowTree::NewWindow(
+    uint32_t change_id,
+    uint32_t window_id,
+    mojo::Map<mojo::String, mojo::Array<uint8_t>> properties) {}
 
 void TestWindowTree::DeleteWindow(uint32_t window_id,
                                   const DeleteWindowCallback& callback) {}