Revert 114515 - broke CrOS tests:

chrome/browser/ui/webui/net_internals_ui.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/net_internals_ui.h"
 
 #include <algorithm>
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 1277 matching lines @@
 
 void NetInternalsMessageHandler::OnImportONCFile(const ListValue* list) {
   std::string onc_blob;
   std::string passcode;
   if (list->GetSize() != 2 ||
       !list->GetString(0, &onc_blob) ||
       !list->GetString(1, &passcode)) {
     NOTREACHED();
   }
 
-  std::string error;
-  chromeos::CrosLibrary::Get()->GetNetworkLibrary()->
-      LoadOncNetworks(onc_blob, passcode, &error);
+  const bool success = chromeos::CrosLibrary::Get()->GetNetworkLibrary()->
+      LoadOncNetworks(onc_blob, passcode);
   SendJavascriptCommand("receivedONCFileParse",
-                        Value::CreateStringValue(error));
+                        Value::CreateBooleanValue(success));
 }
 #endif
 
 void NetInternalsMessageHandler::IOThreadImpl::OnSetLogLevel(
     const ListValue* list) {
   int log_level;
   std::string log_level_string;
   if (!list->GetString(0, &log_level_string) ||
       !base::StringToInt(log_level_string, &log_level)) {
     NOTREACHED();
@@ skipping 260 matching lines @@
   return constants_dict;
 }
 
 NetInternalsUI::NetInternalsUI(TabContents* contents) : ChromeWebUI(contents) {
   AddMessageHandler((new NetInternalsMessageHandler())->Attach(this));
 
   // Set up the chrome://net-internals/ source.
   GetProfile()->GetChromeURLDataManager()->AddDataSource(
       CreateNetInternalsHTMLSource());
 }