Allow SessionService to be disabled.

chrome/browser/browsing_data_remover.cc

Index: chrome/browser/browsing_data_remover.cc
diff --git a/chrome/browser/browsing_data_remover.cc b/chrome/browser/browsing_data_remover.cc
index 70622cfc5036f608daa7d36de3bb161b8d5dd38d..b9e4e9a0682f74f1b50b937003cc098f03523620 100644
--- a/chrome/browser/browsing_data_remover.cc
+++ b/chrome/browser/browsing_data_remover.cc
@@ -240,11 +240,13 @@ void BrowsingDataRemover::RemoveImpl(int remove_mask,
         tab_service->DeleteLastSession();
       }
 
+#if defined(ENABLE_SESSION_SERVICE)
       // We also delete the last session when we delete the history.
       SessionService* session_service =

[sky, 2012/04/04 21:04:51]

Are there some includes that should be moved behind the ifdef too?

[Yaron, 2012/04/04 21:36:18]

jam@ requested that we introduce less if-defs and not if-def headers unless
they're including new Android-specific code.

           SessionServiceFactory::GetForProfile(profile_);
       if (session_service)
         session_service->DeleteLastSession();
+#endif
     }
   }