Shell of implementation for embedded windows. At this point this is

views/widget/widget.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef VIEWS_WIDGET_WIDGET_H_
 #define VIEWS_WIDGET_WIDGET_H_
 #pragma once
 
 #include <stack>
 
@@ skipping 468 matching lines @@
 
   ClientView* client_view() {
     return const_cast<ClientView*>(
         const_cast<const Widget*>(this)->client_view());
   }
   const ClientView* client_view() const {
     // non_client_view_ may be NULL, especially during creation.
     return non_client_view_ ? non_client_view_->client_view() : NULL;
   }
 
-#if defined(UNIT_TEST)
-  static void set_compositor_factory(ui::Compositor*(*factory)()) {
+  static void set_compositor_factory_for_testing(ui::Compositor*(*factory)()) {
     compositor_factory_ = factory;
   }
-#endif
   static ui::Compositor* (*compositor_factory())() {
     return compositor_factory_;
   }
 
   const ui::Compositor* GetCompositor() const;
   ui::Compositor* GetCompositor();
 
   // Invokes method of same name on the NativeWidget.
   void MarkLayerDirty();
   void CalculateOffsetToAncestorWithLayer(gfx::Point* offset, View** ancestor);
@@ skipping 195 matching lines @@
 
   // Factory used to create Compositors. Settable by tests.
   static ui::Compositor*(*compositor_factory_)();
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif // VIEWS_WIDGET_WIDGET_H_