Revert r74860 as it broke arm:

chrome/browser/dom_ui/options/language_options_handler_common.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/dom_ui/options/language_options_handler_common.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 79 matching lines @@
   // The following are resources, rather than local strings.
   localized_strings->SetString("currentUiLanguageCode",
                                g_browser_process->GetApplicationLocale());
   localized_strings->Set("spellCheckLanguageCodeSet",
                          GetSpellCheckLanguageCodeSet());
   localized_strings->Set("uiLanguageCodeSet", GetUILanguageCodeSet());
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   bool experimental_spell_check_features =
       command_line.HasSwitch(switches::kExperimentalSpellcheckerFeatures);
-  localized_strings->SetBoolean("experimentalSpellCheckFeatures",
-                                experimental_spell_check_features);
+  localized_strings->SetString("experimentalSpellCheckFeatures",
+      experimental_spell_check_features ? "true" : "false");
 }
 
 void LanguageOptionsHandlerCommon::RegisterMessages() {
   DCHECK(web_ui_);
   web_ui_->RegisterMessageCallback("languageOptionsOpen",
       NewCallback(
           this,
           &LanguageOptionsHandlerCommon::LanguageOptionsOpenCallback));
   web_ui_->RegisterMessageCallback("spellCheckLanguageChange",
       NewCallback(
@@ skipping 43 matching lines @@
 }
 
 void LanguageOptionsHandlerCommon::SpellCheckLanguageChangeCallback(
     const ListValue* args) {
   const std::string language_code = WideToASCII(ExtractStringValue(args));
   CHECK(!language_code.empty());
   const std::string action = StringPrintf(
       "LanguageOptions_SpellCheckLanguageChange_%s", language_code.c_str());
   UserMetrics::RecordComputedAction(action);
 }