Allow SessionService to be disabled.

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index f20368f65c23bca8835a739e62770d2aafec3b20..9f76bc150133df952a130e42f8f55469525ec45c 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -154,14 +154,17 @@ class ProfileImpl : public Profile,
   void CreateWebDataService();
   FilePath GetPrefFilePath();
 
+#if defined(ENABLE_SESSION_SERVICE)
   void StopCreateSessionServiceTimer();
 
+  void EnsureSessionServiceCreated();
+#endif
+
+
   void EnsureRequestContextCreated() {
     GetRequestContext();
   }
 
-  void EnsureSessionServiceCreated();
-
   void UpdateProfileUserNameCache();
 
 
@@ -223,7 +226,9 @@ class ProfileImpl : public Profile,
   // Whether or not the last session exited cleanly. This is set only once.
   bool last_session_exited_cleanly_;
 
+#if defined(ENABLE_SESSION_SERVICE)
   base::OneShotTimer<ProfileImpl> create_session_service_timer_;
+#endif
 
   scoped_ptr<Profile> off_the_record_profile_;