Move apps/shell to extensions/shell.

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 bc95893e2539de907380bfb1ba58b3bd629ab087..cd79ca76b7c0a7b0cbdd10630085b3b1c1f57def 100644
--- a/athena/activity/public/activity_factory.h
+++ b/athena/activity/public/activity_factory.h
@@ -8,14 +8,14 @@
 #include "athena/athena_export.h"
 #include "url/gurl.h"
 
-namespace apps {
-class ShellAppWindow;
-}
-
 namespace content {
 class BrowserContext;
 }
 
+namespace extensions {
+class ShellAppWindow;
+}
+
 namespace athena {
 class Activity;
 
@@ -38,7 +38,8 @@ class ATHENA_EXPORT ActivityFactory {
 
   // Create an activity of an app with |app_window|. The returned activity
   // should own |app_window|.
-  virtual Activity* CreateAppActivity(apps::ShellAppWindow* app_window) = 0;
+  virtual Activity* CreateAppActivity(
+      extensions::ShellAppWindow* app_window) = 0;
 };
 
 }  // namespace athena