Enables the user to select multiple languages for spellchecking (UI)

chrome/browser/ui/webui/options/language_options_handler_common.cc

Index: chrome/browser/ui/webui/options/language_options_handler_common.cc
diff --git a/chrome/browser/ui/webui/options/language_options_handler_common.cc b/chrome/browser/ui/webui/options/language_options_handler_common.cc
index 98a17872f1ff6f95a2c382e8becdb8c6c3b5808c..d955264b14f9e2c6a6aa5de4937769e2f379d9e6 100644
--- a/chrome/browser/ui/webui/options/language_options_handler_common.cc
+++ b/chrome/browser/ui/webui/options/language_options_handler_common.cc
@@ -132,6 +132,10 @@ void LanguageOptionsHandlerCommon::GetLocalizedValues(
   localized_strings->SetBoolean("enableSpellingAutoCorrect",
                                 enable_spelling_auto_correct);
 
+  localized_strings->SetBoolean(
+      "enableMultilingualSpellChecker",
+      chrome::spellcheck_common::IsMultilingualSpellcheckEnabled());
+
   Profile* profile = Profile::FromWebUI(web_ui());
   PrefService* prefs = profile->GetPrefs();
   std::string default_target_language =
@@ -254,7 +258,6 @@ void LanguageOptionsHandlerCommon::SpellCheckLanguageChangeCallback(
     const base::ListValue* args) {
   const std::string language_code =
       base::UTF16ToASCII(ExtractStringValue(args));
-  CHECK(!language_code.empty());

[Dan Beam, 2015/07/08 18:56:27]

why are you removing this?

[Julius, 2015/07/08 20:38:48]

language_code can actually be empty now because in multilingual spellchecking
the user can deselect all languages.

[Dan Beam, 2015/07/08 22:50:24]

why can they de-select all languages?

   const std::string action = base::StringPrintf(
       "LanguageOptions_SpellCheckLanguageChange_%s", language_code.c_str());
   content::RecordComputedAction(action);