Mandoline: let html_viewer handle more contents

mojo/fetcher/network_fetcher.cc

Index: mojo/fetcher/network_fetcher.cc
diff --git a/mojo/fetcher/network_fetcher.cc b/mojo/fetcher/network_fetcher.cc
index 24a11688c30eb289df18db9301fa118a3ba6af15..603cf50de6c42c017227f7e8f6a61e47d0097103 100644
--- a/mojo/fetcher/network_fetcher.cc
+++ b/mojo/fetcher/network_fetcher.cc
@@ -242,14 +242,6 @@ void NetworkFetcher::OnLoadComplete(URLResponsePtr response) {
     return;
   }
 
-  if (response->status_code >= 400 && response->status_code < 600) {
-    LOG(ERROR) << "Error (" << response->status_code << ": "
-               << response->status_line << "): "
-               << "while fetching " << response->url;
-    loader_callback_.Run(nullptr);
-    return;
-  }
-
   response_ = response.Pass();
   loader_callback_.Run(owner.Pass());
 }