[mac] Send the system spellchecker language to the renderer.

chrome/browser/spellchecker/spellcheck_platform_android.cc

Index: chrome/browser/spellchecker/spellcheck_platform_android.cc
diff --git a/chrome/browser/spellchecker/spellcheck_platform_android.cc b/chrome/browser/spellchecker/spellcheck_platform_android.cc
index a0c338f66d0d6960372ae83adc6df73a78de22ab..101794373e72b6261c75e58721a7eb0dc147d20a 100644
--- a/chrome/browser/spellchecker/spellcheck_platform_android.cc
+++ b/chrome/browser/spellchecker/spellcheck_platform_android.cc
@@ -13,6 +13,10 @@ namespace spellcheck_platform {
 void GetAvailableLanguages(std::vector<std::string>* spellcheck_languages) {
 }
 
+std::string GetSpellCheckerLanguage() {
+  return std::string();
+}
+
 bool SpellCheckerAvailable() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableAndroidSpellChecker);