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..b137b6276329de328f784979d24a4a49f40f7054 100644
--- a/chrome/browser/speech/tts_controller.h
+++ b/chrome/browser/speech/tts_controller.h
@@ -101,7 +101,7 @@ class Utterance {
   // when the utterance is done speaking. Before speaking this utterance,
   // its other parameters like text, rate, pitch, etc. should all be set.
   explicit Utterance(Profile* profile);
-  ~Utterance();
+  virtual ~Utterance();
 
   // Sends an event to the delegate. If the event type is TTS_EVENT_END
   // or TTS_EVENT_ERROR, deletes the utterance. If |char_index| is -1,
@@ -185,6 +185,9 @@ class Utterance {
   int id() const { return id_; }
   bool finished() const { return finished_; }
 
+ protected:
+  void set_finished_for_testing(bool finished) { finished_ = finished; }
+
  private:
   // The profile that initiated this utterance.
   Profile* profile_;
@@ -281,10 +284,6 @@ 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();