Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/mus/mus_client.cc

Index: ui/views/mus/mus_client.cc
diff --git a/ui/views/mus/mus_client.cc b/ui/views/mus/mus_client.cc
index 1f093fbf8f5526bbafff016f70034f5fdb13150f..22f281f09cce988740999015145c09d9ed331a00 100644
--- a/ui/views/mus/mus_client.cc
+++ b/ui/views/mus/mus_client.cc
@@ -79,13 +79,18 @@ MusClient::~MusClient() {
   instance_ = nullptr;
 }
 
+// static
+bool MusClient::ShouldCreateDesktopNativeWidgetAura(
+    const Widget::InitParams& init_params) {
+  // TYPE_CONTROL and child widgets require a NativeWidgetAura.
+  return init_params.type != Widget::InitParams::TYPE_CONTROL &&
+         !init_params.child;
+}
+
 NativeWidget* MusClient::CreateNativeWidget(
     const Widget::InitParams& init_params,
     internal::NativeWidgetDelegate* delegate) {
-  // TYPE_CONTROL widgets require a NativeWidgetAura. So we let this fall
-  // through, so that the default NativeWidgetPrivate::CreateNativeWidget() is

[msw, 2016/11/11 00:29:24]

nit: keeps some comment about returning null to use the default
NativeWidgetPrivate::CreateNativeWidget()

[sky, 2016/11/11 01:09:13]

Done.

-  // used instead.
-  if (init_params.type == Widget::InitParams::TYPE_CONTROL)
+  if (!ShouldCreateDesktopNativeWidgetAura(init_params))
     return nullptr;
 
   DesktopNativeWidgetAura* native_widget =