Prevent crash on unrecoverable error method call on FrontendDataTypeControllers.

chrome/browser/sync/profile_sync_service.h

Index: chrome/browser/sync/profile_sync_service.h
diff --git a/chrome/browser/sync/profile_sync_service.h b/chrome/browser/sync/profile_sync_service.h
index 7cfcbbe4cd76e570590e210210910c772da2ad6b..63824b9fe2dfaa18d8a15a64927e825380345970 100644
--- a/chrome/browser/sync/profile_sync_service.h
+++ b/chrome/browser/sync/profile_sync_service.h
@@ -105,7 +105,8 @@ struct UserShare;
 class ProfileSyncService : public browser_sync::SyncFrontend,
                            public browser_sync::SyncPrefObserver,
                            public browser_sync::UnrecoverableErrorHandler,
-                           public NotificationObserver {
+                           public NotificationObserver,
+                           public base::SupportsWeakPtr<ProfileSyncService> {

[tim (not reviewing), 2011/10/19 00:16:15]

ok, lets do this for now (16), but file an m17 bug and add a todo to have an
internal weak ptr factory, and vend a WeakPtr to the DTCs.

[lipalani1, 2011/10/19 00:44:29]

Done.

  public:
   typedef ProfileSyncServiceObserver Observer;
   typedef browser_sync::SyncBackendHost::Status Status;