[spellcheck] Don't spellcheck in removed language.

chrome/browser/spellchecker/spellcheck_service.h

Index: chrome/browser/spellchecker/spellcheck_service.h
diff --git a/chrome/browser/spellchecker/spellcheck_service.h b/chrome/browser/spellchecker/spellcheck_service.h
index 6c45907d26431df4084bfdcac8662e434e68d0c2..b2a03b471b032856fd26477ffef382696f27fb60 100644
--- a/chrome/browser/spellchecker/spellcheck_service.h
+++ b/chrome/browser/spellchecker/spellcheck_service.h
@@ -156,6 +156,11 @@ class SpellcheckService : public KeyedService,
   // Notification handler for changes to prefs::kSpellCheckUseSpellingService.
   void OnUseSpellingServiceChanged();
 
+  // Notification handler for changes to prefs::kAcceptLanguages. Removes from
+  // prefs::kSpellCheckDictionaries any languages that are not in
+  // prefs::kAcceptLanguages.
+  void OnAcceptLanguagesChanged();

[groby-ooo-7-16, 2016/02/09 02:51:33]

Do we have any listener for the on/off of the flag? 

[please use gerrit instead, 2016/02/09 20:45:49]

Yes, it's hooked directly to InitForAllRenderers():

 pref_change_registrar_.Add(
      prefs::kEnableContinuousSpellcheck,
      base::Bind(&SpellcheckService::InitForAllRenderers,
                 base::Unretained(this)));

https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/spe...

+
   // Enables the feedback sender if spelling server is available and enabled.
   // Otherwise disables the feedback sender.
   void UpdateFeedbackSenderState();