Move app_shell specific impl from athena_lib to athena_shell_lib

athena/content/public/content_activity_factory_creator.h

Index: athena/content/public/content_activity_factory_creator.h
diff --git a/athena/content/public/content_activity_factory_creator.h b/athena/content/public/content_activity_factory_creator.h
new file mode 100644
index 0000000000000000000000000000000000000000..ca4b7c74b8bd1b777f1a894f9433f4dc63b4392c
--- /dev/null
+++ b/athena/content/public/content_activity_factory_creator.h
@@ -0,0 +1,16 @@
+// Copyright 2014 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 ATHENA_CONTENT_CONTENT_ACTIVITY_FACTORY_CREATOR_H_
+#define ATHENA_CONTENT_CONTENT_ACTIVITY_FACTORY_CREATOR_H_
+
+namespace athena {
+
+class ActivityFactory;
+
+ActivityFactory* CreateContentActivityFactory();
+
+}  // namespace athena
+
+#endif  // ATHENA_CONTENT_CONTENT_ACTIVITY_FACTORY_CREATOR_H_