Automatically trigger installation of high-quality speech synthesis extension.

chrome/browser/speech/tts_controller.h

Index: chrome/browser/speech/tts_controller.h
diff --git a/chrome/browser/speech/tts_controller.h b/chrome/browser/speech/tts_controller.h
index 60815185c5fc57cf7c2cbe3da7812216038471b2..b454c44c1b9b65e082efd53a3e98e70645d45778 100644
--- a/chrome/browser/speech/tts_controller.h
+++ b/chrome/browser/speech/tts_controller.h
@@ -281,10 +281,6 @@ class TtsController {
   // if supported, and all voices registered by extensions.
   void GetVoices(Profile* profile, std::vector<VoiceData>* out_voices);
 
-  // Called by TtsExtensionLoaderChromeOs::LoadTtsExtension when it
-  // finishes loading the built-in TTS component extension.
-  void RetrySpeakingQueuedUtterances();
-
   // Called by the extension system or platform implementation when the
   // list of voices may have changed and should be re-queried.
   void VoicesChanged();