Index: components/proxy_config/pref_proxy_config_tracker.h |
diff --git a/components/proxy_config/pref_proxy_config_tracker.h b/components/proxy_config/pref_proxy_config_tracker.h |
index d51abc8ae947b706875ba481b8fefd3331817a11..77e2e36ccfe50c049ede3f562482223f57e840d0 100644 |
--- a/components/proxy_config/pref_proxy_config_tracker.h |
+++ b/components/proxy_config/pref_proxy_config_tracker.h |
@@ -29,7 +29,7 @@ class PROXY_CONFIG_EXPORT PrefProxyConfigTracker { |
// before DetachFromPrefService was called. Takes ownership of the passed |
// |base_service|, which can be NULL. This |base_service| provides the proxy |
// settings of the OS (except of ChromeOS). This must be called on the |
- // UI thread. |
+ // UI thread. May only be called once on a PrefProxyConfigTracker. |
virtual std::unique_ptr<net::ProxyConfigService> |
CreateTrackingProxyConfigService( |
std::unique_ptr<net::ProxyConfigService> base_service) = 0; |