Move app_shell specific impl from athena_lib to athena_shell_lib

athena/activity/public/activity_factory.h

Index: athena/activity/public/activity_factory.h
diff --git a/athena/activity/public/activity_factory.h b/athena/activity/public/activity_factory.h
index cd79ca76b7c0a7b0cbdd10630085b3b1c1f57def..d9ec79a1760754e36c7e62e71475f006400db59d 100644
--- a/athena/activity/public/activity_factory.h
+++ b/athena/activity/public/activity_factory.h
@@ -8,6 +8,10 @@
 #include "athena/athena_export.h"
 #include "url/gurl.h"
 
+namespace apps {
+class AppWindow;
+}
+
 namespace content {
 class BrowserContext;
 }
@@ -36,10 +40,15 @@ class ATHENA_EXPORT ActivityFactory {
   virtual Activity* CreateWebActivity(content::BrowserContext* browser_context,
                                       const GURL& url) = 0;
 
-  // Create an activity of an app with |app_window|. The returned activity
-  // should own |app_window|.
+  // Create an activity of an app with |app_window| for app shell environemnt.
+  // The returned activity should own |app_window|.
+  // TODO(oshima): Consolidate these two methods to create AppActivity
+  // once crbug.com/403726 is finished.
   virtual Activity* CreateAppActivity(
       extensions::ShellAppWindow* app_window) = 0;
+
+  // Create an activity of an app with |app_window| for chrome environment.
+  virtual Activity* CreateAppActivity(apps::AppWindow* app_window) = 0;
 };
 
 }  // namespace athena