Fix the build break of preferences.cc

chrome/browser/chromeos/preferences.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/chromeos/preferences.h"
 
 #include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
@@ skipping 570 matching lines @@
        iter != virtual_keyboard_pref->end_keys();
        ++iter) {
     const std::string& layout_id = *iter;  // e.g. "us", "handwriting-vk"
     if (!virtual_keyboard_pref->GetString(layout_id, &url))
       continue;
     if (!input_method_manager->SetVirtualKeyboardPreference(
             layout_id, GURL(url))) {
       // Either |layout_id| or |url| is invalid. Remove the key from |prefs|
       // later.
       layouts_to_remove.push_back(layout_id);
-      LOG(ERROR) << "Removing invalid virtual keyboard pref: layout=" << layout;
+      LOG(ERROR) << "Removing invalid virtual keyboard pref: layout="
+                 << layout_id;
     }
   }
 
   // Remove invalid prefs.
   DictionaryPrefUpdate updater(prefs, prefs::kLanguagePreferredVirtualKeyboard);
   DictionaryValue* pref_value = updater.Get();
   for (size_t i = 0; i < layouts_to_remove.size(); ++i) {
     pref_value->RemoveWithoutPathExpansion(layouts_to_remove[i], NULL);
   }
 }
 
 }  // namespace chromeos