Allow embedders to provide a custom view for popup (select box) widgets,

content/test/test_web_contents_view.cc

Index: content/test/test_web_contents_view.cc
===================================================================
--- content/test/test_web_contents_view.cc	(revision 175506)
+++ content/test/test_web_contents_view.cc	(working copy)
@@ -51,6 +51,11 @@
   return NULL;
 }
 
+RenderWidgetHostView* TestWebContentsView::CreateViewForPopupWidget(
+    RenderWidgetHost* render_widget_host) {
+  return NULL;
+}
+
 gfx::NativeView TestWebContentsView::GetNativeView() const {
   return gfx::NativeView();
 }