[Sync] Rename syncable_prefs to sync_preferences.

chrome/browser/profiles/off_the_record_profile_impl.h

Index: chrome/browser/profiles/off_the_record_profile_impl.h
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.h b/chrome/browser/profiles/off_the_record_profile_impl.h
index 9e9dc71f22daeb5a385fdb8cdd1d5ef472242e32..5010e97fdfd8d2edce72603aa5da44e5b33d0381 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.h
+++ b/chrome/browser/profiles/off_the_record_profile_impl.h
@@ -20,7 +20,7 @@
 using base::Time;
 using base::TimeDelta;
 
-namespace syncable_prefs {
+namespace sync_preferences {
 class PrefServiceSyncable;
 }
 
@@ -126,7 +126,7 @@ class OffTheRecordProfileImpl : public Profile {
   Profile* profile_;
 
   // Weak pointer owned by |profile_|.
-  syncable_prefs::PrefServiceSyncable* prefs_;
+  sync_preferences::PrefServiceSyncable* prefs_;
 
   std::unique_ptr<content::HostZoomMap::Subscription> track_zoom_subscription_;
   std::unique_ptr<ChromeZoomLevelPrefs::DefaultZoomLevelSubscription>