Unregister GCMInvalidationBridge from GCMDriver when user signs out.

components/invalidation/ticl_invalidation_service.cc

Index: components/invalidation/ticl_invalidation_service.cc
diff --git a/components/invalidation/ticl_invalidation_service.cc b/components/invalidation/ticl_invalidation_service.cc
index c606c2887e49e22b913d52025cef60c0fece3968..e60902c0764dfc961593ceff0297cde1e92e9590 100644
--- a/components/invalidation/ticl_invalidation_service.cc
+++ b/components/invalidation/ticl_invalidation_service.cc
@@ -262,6 +262,9 @@ void TiclInvalidationService::OnActiveAccountLogout() {
   access_token_request_.reset();
   request_access_token_retry_timer_.Stop();
 
+  if (gcm_invalidation_bridge_)
+    gcm_invalidation_bridge_->Unregister();
+
   if (IsStarted()) {
     StopInvalidator();
   }