Navigation: move RestoreType and ReloadType into a separate file

chrome/browser/sessions/session_service.cc

Index: chrome/browser/sessions/session_service.cc
diff --git a/chrome/browser/sessions/session_service.cc b/chrome/browser/sessions/session_service.cc
index 62dcc8931cd8f230a02c334735d7b85e9ce9d05f..2243c0df517557f98d32e63376627966d58559ac 100644
--- a/chrome/browser/sessions/session_service.cc
+++ b/chrome/browser/sessions/session_service.cc
@@ -671,8 +671,8 @@ void SessionService::Observe(int type,
           session_tab_helper->session_id(),
           navigation);
       content::Details<content::LoadCommittedDetails> changed(details);
-      if (changed->type == content::NAVIGATION_TYPE_NEW_PAGE ||
-        changed->type == content::NAVIGATION_TYPE_EXISTING_PAGE) {
+      if (changed->type == content::NavigationType::NEW_PAGE ||
+          changed->type == content::NavigationType::EXISTING_PAGE) {
         RecordSessionUpdateHistogramData(type,
                                          &last_updated_nav_entry_commit_time_);
       }