Clear session-only data when all browser windows are closed.

chrome/browser/sessions/session_service_factory.cc

Index: chrome/browser/sessions/session_service_factory.cc
diff --git a/chrome/browser/sessions/session_service_factory.cc b/chrome/browser/sessions/session_service_factory.cc
index 05cf1989899cdad0688c324f4be690b59bd4ca9d..7e928f988db2fbbbae2c893d4ba1027a91131ee2 100644
--- a/chrome/browser/sessions/session_service_factory.cc
+++ b/chrome/browser/sessions/session_service_factory.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/sessions/session_service_factory.h"
 
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sessions/session_data_deleter.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
 
@@ -33,6 +34,8 @@ SessionService* SessionServiceFactory::GetForProfileIfExisting(
 
 // static
 void SessionServiceFactory::ShutdownForProfile(Profile* profile) {
+  DeleteSessionOnlyData(profile);
+
   // We're about to exit, force creation of the session service if it hasn't
   // been created yet. We do this to ensure session state matches the point in
   // time the user exited.