Mark error pages as such on Ctrl-Shift-T reload.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 979b26c1dc5603b12adb1edc1907ea5a08cc41aa..716db64baf6d28c22154c53eb0d08999aaff675e 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -1124,6 +1124,8 @@ void NavigationControllerImpl::RendererDidNavigateToExistingPage(
   NavigationEntryImpl* entry = entries_[entry_index].get();
 
   // The URL may have changed due to redirects.
+  if (params.url_is_unreachable)
+    entry->set_page_type(PAGE_TYPE_ERROR);

[Charlie Reis, 2015/02/12 21:57:47]

Seems reasonable to me.  What about the other RendererDidNavigate* functions? 
SamePage and InPage might matter (e.g., #foo on the network error page).  Not
sure about the subframe cases.

   entry->SetURL(params.url);
   entry->SetReferrer(params.referrer);
   if (entry->update_virtual_url_with_url())