aura-mus: Implement Deactivate().

ui/aura/test/aura_test_base.cc

Index: ui/aura/test/aura_test_base.cc
diff --git a/ui/aura/test/aura_test_base.cc b/ui/aura/test/aura_test_base.cc
index 73254bdd7f809aaeac3f06496b16a2ea0b142ff5..e914efdb1e20d4f31d7160a0e10a7f73d69557a2 100644
--- a/ui/aura/test/aura_test_base.cc
+++ b/ui/aura/test/aura_test_base.cc
@@ -222,6 +222,10 @@ void AuraTestBase::OnWmSetClientArea(
     const gfx::Insets& insets,
     const std::vector<gfx::Rect>& additional_client_areas) {}
 
+bool AuraTestBase::IsWindowActive(aura::Window* window) { return false; }
+
+void AuraTestBase::OnWmDeactivateWindow(Window* window) {}
+
 client::CaptureClient* AuraTestBase::GetCaptureClient() {
   return helper_->capture_client();
 }