[Sync] Move SyncPrefs into sync_driver component

chrome/browser/sync/startup_controller.h

Index: chrome/browser/sync/startup_controller.h
diff --git a/chrome/browser/sync/startup_controller.h b/chrome/browser/sync/startup_controller.h
index 6ef4af53cfb5a5f1995fe45b9e233f8613529c64..e218a8f4deab0989bde34da56d65e204b277ce2f 100644
--- a/chrome/browser/sync/startup_controller.h
+++ b/chrome/browser/sync/startup_controller.h
@@ -13,9 +13,11 @@
 class ManagedUserSigninManagerWrapper;
 class ProfileOAuth2TokenService;
 
-namespace browser_sync {
-
+namespace sync_driver {
 class SyncPrefs;
+}
+
+namespace browser_sync {
 
 // Defines the type of behavior the sync engine should use. If configured for
 // AUTO_START, the sync engine will automatically call SetSyncSetupCompleted()
@@ -35,7 +37,7 @@ class StartupController {
  public:
   StartupController(ProfileSyncServiceStartBehavior start_behavior,
                     const ProfileOAuth2TokenService* token_service,
-                    const browser_sync::SyncPrefs* sync_prefs,
+                    const sync_driver::SyncPrefs* sync_prefs,
                     const ManagedUserSigninManagerWrapper* signin,
                     base::Closure start_backend);
   ~StartupController();
@@ -91,7 +93,7 @@ class StartupController {
   // distinct signin flow.
   const bool auto_start_enabled_;
 
-  const browser_sync::SyncPrefs* sync_prefs_;
+  const sync_driver::SyncPrefs* sync_prefs_;
 
   const ProfileOAuth2TokenService* token_service_;