Fix Arc integration test.

chrome/browser/sync/test/integration/sync_arc_package_helper.h

Index: chrome/browser/sync/test/integration/sync_arc_package_helper.h
diff --git a/chrome/browser/sync/test/integration/sync_arc_package_helper.h b/chrome/browser/sync/test/integration/sync_arc_package_helper.h
index d8524f7718fb0891eeca7777d7c2ba26673806a3..e050c18fb82b449294fd30a18cf632bca73a84ed 100644
--- a/chrome/browser/sync/test/integration/sync_arc_package_helper.h
+++ b/chrome/browser/sync/test/integration/sync_arc_package_helper.h
@@ -20,10 +20,6 @@ namespace arc {
 class FakeAppInstance;
 }
 
-namespace chromeos {
-class ScopedUserManagerEnabler;
-}
-
 namespace arc {
 
 class SyncArcPackageHelper {
@@ -32,8 +28,6 @@ class SyncArcPackageHelper {
 
   void SetupTest(SyncTest* test);
 
-  void CleanUp();
-
   void InstallPackageWithIndex(Profile* profile, size_t id);
 
   void UninstallPackageWithIndex(Profile* profile, size_t id);
@@ -68,8 +62,6 @@ class SyncArcPackageHelper {
 
   std::unordered_map<Profile*, std::unique_ptr<FakeAppInstance>> instance_map_;
 
-  std::unique_ptr<chromeos::ScopedUserManagerEnabler> user_manager_enabler_;
-
   DISALLOW_COPY_AND_ASSIGN(SyncArcPackageHelper);
 };