Introduce a layering in the invalidation component as public and impl

components/invalidation/invalidation_switches.h

Index: components/invalidation/invalidation_switches.h
diff --git a/components/invalidation/invalidation_switches.h b/components/invalidation/invalidation_switches.h
deleted file mode 100644
index f38b4576c30765c305f864e9f629d55b267d1979..0000000000000000000000000000000000000000
--- a/components/invalidation/invalidation_switches.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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 COMPONENTS_INVALIDATION_INVALIDATION_SWITCHES_H
-#define COMPONENTS_INVALIDATION_INVALIDATION_SWITCHES_H
-
-namespace invalidation {
-namespace switches {
-
-extern const char kSyncNotificationHostPort[];
-extern const char kSyncAllowInsecureXmppConnection[];
-
-}  // namespace switches
-}  // namespace invalidation
-
-#endif  // COMPONENTS_INVALIDATION_INVALIDATION_SWITCHES_H