[Sync] Add HTTP status codes to NavigationEntry and TabNavigation

content/public/browser/navigation_entry.h

Index: content/public/browser/navigation_entry.h
diff --git a/content/public/browser/navigation_entry.h b/content/public/browser/navigation_entry.h
index c90704537fd447c2652e2921b2b4d5e0bd57a1d5..679cff1cfc456a83bed0c8c6af1abf4515b894fc 100644
--- a/content/public/browser/navigation_entry.h
+++ b/content/public/browser/navigation_entry.h
@@ -177,6 +177,16 @@ class NavigationEntry {
   //   - or this navigation was copied from a foreign session.
   virtual void SetTimestamp(base::Time timestamp) = 0;
   virtual base::Time GetTimestamp() const = 0;
+
+  // The status code of the last known successful navigation.  If
+  // GetHttpStatusCode() returns 0 that means that either:
+  //
+  //   - this navigation hasn't completed yet;
+  //   - a response wasn't received;
+  //   - or this navigation was restored and for some reason the
+  //     status code wasn't available.
+  virtual void SetHttpStatusCode(int http_status_code) = 0;
+  virtual int GetHttpStatusCode() const = 0;
 };
 
 }  // namespace content