Move NativeAppWindow to extensions

apps/ui/views/native_app_window_views.h

Index: apps/ui/views/native_app_window_views.h
diff --git a/apps/ui/views/native_app_window_views.h b/apps/ui/views/native_app_window_views.h
index 453542fd8d7819058318582cfae1f63dcd23ab24..ad1fb7d876c0c0df336debd39e21a46d0513b610 100644
--- a/apps/ui/views/native_app_window_views.h
+++ b/apps/ui/views/native_app_window_views.h
@@ -5,9 +5,10 @@
 #ifndef APPS_UI_VIEWS_NATIVE_APP_WINDOW_VIEWS_H_
 #define APPS_UI_VIEWS_NATIVE_APP_WINDOW_VIEWS_H_
 
-#include "apps/ui/native_app_window.h"
+#include "apps/app_window.h"
 #include "base/observer_list.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "extensions/browser/app_window/native_app_window.h"
 #include "extensions/browser/app_window/size_constraints.h"
 #include "ui/gfx/rect.h"
 #include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
@@ -42,7 +43,7 @@ class AppWindowFrameView;
 
 // A NativeAppWindow backed by a views::Widget. This class may be used alone
 // as a stub or subclassed (for example, ChromeNativeAppWindowViews).
-class NativeAppWindowViews : public NativeAppWindow,
+class NativeAppWindowViews : public extensions::NativeAppWindow,
                              public content::WebContentsObserver,
                              public views::WidgetDelegateView,
                              public views::WidgetObserver {