[Sync] Rename syncable_prefs to sync_preferences.

components/sync_preferences/pref_service_syncable_observer.h

Index: components/sync_preferences/pref_service_syncable_observer.h
diff --git a/components/syncable_prefs/pref_service_syncable_observer.h b/components/sync_preferences/pref_service_syncable_observer.h
similarity index 57%
rename from components/syncable_prefs/pref_service_syncable_observer.h
rename to components/sync_preferences/pref_service_syncable_observer.h
index 92ba143a416050eb4af7f2b4ee8b037347a2dc81..807c180fa1fc2f63e7277e46489f7e71385df2c2 100644
--- a/components/syncable_prefs/pref_service_syncable_observer.h
+++ b/components/sync_preferences/pref_service_syncable_observer.h
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNCABLE_PREFS_PREF_SERVICE_SYNCABLE_OBSERVER_H_
-#define COMPONENTS_SYNCABLE_PREFS_PREF_SERVICE_SYNCABLE_OBSERVER_H_
+#ifndef COMPONENTS_SYNC_PREFERENCES_PREF_SERVICE_SYNCABLE_OBSERVER_H_
+#define COMPONENTS_SYNC_PREFERENCES_PREF_SERVICE_SYNCABLE_OBSERVER_H_
 
-namespace syncable_prefs {
+namespace sync_preferences {
 
 class PrefServiceSyncableObserver {
  public:
@@ -16,6 +16,6 @@ class PrefServiceSyncableObserver {
   virtual ~PrefServiceSyncableObserver() {}
 };
 
-}  // namespace syncable_prefs
+}  // namespace sync_preferences
 
-#endif  // COMPONENTS_SYNCABLE_PREFS_PREF_SERVICE_SYNCABLE_OBSERVER_H_
+#endif  // COMPONENTS_SYNC_PREFERENCES_PREF_SERVICE_SYNCABLE_OBSERVER_H_