Switch BaseSessionService to use SequencedWorkerPool instead of FILE thread

content/browser/web_contents/navigation_controller_impl_unittest.cc

Index: content/browser/web_contents/navigation_controller_impl_unittest.cc
diff --git a/content/browser/web_contents/navigation_controller_impl_unittest.cc b/content/browser/web_contents/navigation_controller_impl_unittest.cc
index c3e9b1934be90bcf8d9bf17bc268fb100ef2f1e7..7a0b03b2bf06d7f09b1feb1144aae0701201b645 100644
--- a/content/browser/web_contents/navigation_controller_impl_unittest.cc
+++ b/content/browser/web_contents/navigation_controller_impl_unittest.cc
@@ -3813,7 +3813,7 @@ class NavigationControllerHistoryTest : public NavigationControllerTest {
                                  controller.session_id(), 0);
     controller.SetWindowID(window_id);
 
-    session_helper_.set_service(service);
+    session_helper_.SetService(service);
   }
 
   virtual void TearDown() {
@@ -3841,12 +3841,12 @@ class NavigationControllerHistoryTest : public NavigationControllerTest {
   // Deletes the current profile manager and creates a new one. Indirectly this
   // shuts down the history database and reopens it.
   void ReopenDatabase() {
-    session_helper_.set_service(NULL);
+    session_helper_.SetService(NULL);
     SessionServiceFactory::SetForTestProfile(profile(), NULL);
 
     SessionService* service = new SessionService(profile());
     SessionServiceFactory::SetForTestProfile(profile(), service);
-    session_helper_.set_service(service);
+    session_helper_.SetService(service);
   }
 
   void GetLastSession() {