Revert r74860 as it broke arm:

chrome/browser/dom_ui/options/language_options_handler_common.cc

Index: chrome/browser/dom_ui/options/language_options_handler_common.cc
diff --git a/chrome/browser/dom_ui/options/language_options_handler_common.cc b/chrome/browser/dom_ui/options/language_options_handler_common.cc
index e2e4403c186dcf0c6b611351aeb30fab99f56577..3d5a7f479e9906c931cb38997696014896a3dd05 100644
--- a/chrome/browser/dom_ui/options/language_options_handler_common.cc
+++ b/chrome/browser/dom_ui/options/language_options_handler_common.cc
@@ -97,8 +97,8 @@ void LanguageOptionsHandlerCommon::GetLocalizedValues(
   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() {