Move tracked prefs into services/preferences/tracked.

services/preferences/public/cpp/tracked/pref_names.h

Index: services/preferences/public/cpp/tracked/pref_names.h
diff --git a/components/user_prefs/tracked/pref_names.h b/services/preferences/public/cpp/tracked/pref_names.h
similarity index 58%
rename from components/user_prefs/tracked/pref_names.h
rename to services/preferences/public/cpp/tracked/pref_names.h
index 80aa6bf5d0739ff1897864911f591fad2a8f6033..2f594f5059feaef0dd85c739d2edb21d68e2f937 100644
--- a/components/user_prefs/tracked/pref_names.h
+++ b/services/preferences/public/cpp/tracked/pref_names.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_USER_PREFS_TRACKED_PREF_NAMES_H_
-#define COMPONENTS_USER_PREFS_TRACKED_PREF_NAMES_H_
+#ifndef SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_PREF_NAMES_H_
+#define SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_PREF_NAMES_H_
 
 namespace user_prefs {
 
@@ -11,4 +11,4 @@ extern const char kPreferenceResetTime[];
 
 }  // namespace user_prefs
 
-#endif  // COMPONENTS_USER_PREFS_TRACKED_PREF_NAMES_H_
+#endif  // SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_PREF_NAMES_H_