Replace more ObserverList with base::ObserverList.

components/password_manager/core/browser/log_router.h

Index: components/password_manager/core/browser/log_router.h
diff --git a/components/password_manager/core/browser/log_router.h b/components/password_manager/core/browser/log_router.h
index 06ca4e65e69781c0480de0591dd2b9ead268f8bd..f959dbad20e0e1e5ef2a568b5c83a8f1d2a7a5a2 100644
--- a/components/password_manager/core/browser/log_router.h
+++ b/components/password_manager/core/browser/log_router.h
@@ -51,8 +51,8 @@ class LogRouter {
   // Observer lists for clients and receivers. The |true| in the template
   // specialisation means that they will check that all observers were removed
   // on destruction.
-  ObserverList<PasswordManagerClient, true> clients_;
-  ObserverList<LogReceiver, true> receivers_;
+  base::ObserverList<PasswordManagerClient, true> clients_;
+  base::ObserverList<LogReceiver, true> receivers_;
 
   // Logs accumulated since the first receiver was registered.
   std::string accumulated_logs_;