Fixed view example. It was failing because some of view classes requires WidgetGTK in

views/controls/scroll_view.cc

Index: views/controls/scroll_view.cc
diff --git a/views/controls/scroll_view.cc b/views/controls/scroll_view.cc
index a5b5f6a67cc3a72008278b5bf1e0a0848579e6e5..84ce6c7ac32f9b4b2924e991e153da0cec76d502 100644
--- a/views/controls/scroll_view.cc
+++ b/views/controls/scroll_view.cc
@@ -190,7 +190,8 @@ void ScrollView::Layout() {
 
   // Non-default.
   if (horiz_sb_required) {
-    viewport_bounds.set_height(viewport_bounds.height() - horiz_sb_height);
+    viewport_bounds.set_height(
+        std::max(0, viewport_bounds.height() - horiz_sb_height));
     should_layout_contents = true;
   }
   // Default.