Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/sessions/session_restore.cc

Index: chrome/browser/sessions/session_restore.cc
diff --git a/chrome/browser/sessions/session_restore.cc b/chrome/browser/sessions/session_restore.cc
index 7598e0f746e8d59a1dcacca4e0100dd99e5a7672..8a0f4907e3423af2119efb41ad02e1f9c94876cd 100644
--- a/chrome/browser/sessions/session_restore.cc
+++ b/chrome/browser/sessions/session_restore.cc
@@ -716,10 +716,10 @@ class SessionRestoreImpl : public content::NotificationObserver {
   // Responsible for loading the tabs.
   scoped_refptr<TabLoader> tab_loader_;
 
-  // When synchronous we run a nested message loop. To avoid creating windows
-  // from the nested message loop (which can make exiting the nested message
+  // When synchronous we run a nested run loop. To avoid creating windows
+  // from the nested run loop (which can make exiting the nested message
   // loop take a while) we cache the SessionWindows here and create the actual
-  // windows when the nested message loop exits.
+  // windows when the nested run loop exits.
   std::vector<std::unique_ptr<sessions::SessionWindow>> windows_;
   SessionID::id_type active_window_id_;