Remove the HANDLED_EXTERNALLY status code.

chrome/renderer/localized_error.cc

Index: chrome/renderer/localized_error.cc
diff --git a/chrome/renderer/localized_error.cc b/chrome/renderer/localized_error.cc
index 430c4afc9957475a75443a998a7959d43fadc5fa..0da06e29b9464a1579ff785f7a70a49fa7577087 100644
--- a/chrome/renderer/localized_error.cc
+++ b/chrome/renderer/localized_error.cc
@@ -371,7 +371,7 @@ string16 GetErrorDetailsString(const std::string& error_domain,
                                const string16& details) {
   int error_page_template;
   const char* error_string;
-  if (error_domain == net::kErrorDomain) {
+  if (error_domain == net::kErrorDomain || error_domain == "ext") {
     error_page_template = IDS_ERRORPAGES_DETAILS_TEMPLATE;
     error_string = net::ErrorToString(error_code);
     DCHECK(error_code < 0);  // Net error codes are negative.
@@ -402,7 +402,7 @@ const LocalizedErrorMap* FindErrorMapInArray(const LocalizedErrorMap* maps,
 
 const LocalizedErrorMap* LookupErrorMap(const std::string& error_domain,
                                         int error_code) {
-  if (error_domain == net::kErrorDomain) {
+  if (error_domain == net::kErrorDomain || error_domain == "ext") {
     return FindErrorMapInArray(net_error_options,
                                arraysize(net_error_options),
                                error_code);