MacViews: Fix ViewTest.HandleAccelerator by faking window activation

ui/views/test/scoped_views_test_helper.h

Index: ui/views/test/scoped_views_test_helper.h
diff --git a/ui/views/test/scoped_views_test_helper.h b/ui/views/test/scoped_views_test_helper.h
index acf6b649f6be64a900686a27e860ef81135ee961..f41b79ef3abdc51e1b1832ab9ebf478afbb1288a 100644
--- a/ui/views/test/scoped_views_test_helper.h
+++ b/ui/views/test/scoped_views_test_helper.h
@@ -36,6 +36,7 @@ class ScopedViewsTestHelper {
   gfx::NativeWindow GetContext();
 
   TestViewsDelegate* views_delegate() { return views_delegate_.get(); };
+  ViewsTestHelper* views_test_helper() { return test_helper_.get(); }
 
  private:
   scoped_ptr<TestViewsDelegate> views_delegate_;