Navigation: move RestoreType and ReloadType into a separate file

chrome/browser/ui/browser_tabrestore.cc

Index: chrome/browser/ui/browser_tabrestore.cc
diff --git a/chrome/browser/ui/browser_tabrestore.cc b/chrome/browser/ui/browser_tabrestore.cc
index ca3a06d0ce87e1621a44fe63847d5c5fbf949281..084d6fcdea5a98a9af52fd2b5e5c3c650aee2052 100644
--- a/chrome/browser/ui/browser_tabrestore.cc
+++ b/chrome/browser/ui/browser_tabrestore.cc
@@ -19,6 +19,7 @@
 #include "content/public/browser/session_storage_namespace.h"
 #include "content/public/browser/web_contents.h"
 
+using content::RestoreType;
 using content::WebContents;
 using content::NavigationController;
 using content::NavigationEntry;
@@ -29,13 +30,12 @@ namespace chrome {
 
 namespace {
 
-NavigationController::RestoreType GetRestoreType(Browser* browser,
-                                                 bool from_last_session) {
+RestoreType GetRestoreType(Browser* browser, bool from_last_session) {
   if (!from_last_session)
-    return NavigationController::RESTORE_CURRENT_SESSION;
-  return browser->profile()->GetLastSessionExitType() == Profile::EXIT_CRASHED ?
-      NavigationController::RESTORE_LAST_SESSION_CRASHED :
-      NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY;
+    return RestoreType::CURRENT_SESSION;
+  return browser->profile()->GetLastSessionExitType() == Profile::EXIT_CRASHED
+             ? RestoreType::LAST_SESSION_CRASHED
+             : RestoreType::LAST_SESSION_EXITED_CLEANLY;
 }
 
 WebContents* CreateRestoredTab(