Automatically trigger installation of high-quality speech synthesis extension.

chrome/browser/speech/tts_controller.cc

Index: chrome/browser/speech/tts_controller.cc
diff --git a/chrome/browser/speech/tts_controller.cc b/chrome/browser/speech/tts_controller.cc
index 902168c356b18d802e6f349558548df3a34ff10a..b9427ad1fbb7975d2d9ac3b133b75f94bbbd73df 100644
--- a/chrome/browser/speech/tts_controller.cc
+++ b/chrome/browser/speech/tts_controller.cc
@@ -166,6 +166,8 @@ void TtsController::SpeakNow(Utterance* utterance) {
   else
     voice.native = true;
 
+  GetPlatformImpl()->WillSpeakUtteranceWithVoice(utterance, voice);
+
   if (!voice.native) {
 #if !defined(OS_ANDROID)
     DCHECK(!voice.extension_id.empty());
@@ -195,14 +197,6 @@ void TtsController::SpeakNow(Utterance* utterance) {
     if (!success)
       current_utterance_ = NULL;
 
-    // If the native voice wasn't able to process this speech, see if
-    // the browser has built-in TTS that isn't loaded yet.
-    if (!success &&
-        GetPlatformImpl()->LoadBuiltInTtsExtension(utterance->profile())) {
-      utterance_queue_.push(utterance);
-      return;
-    }
-
     if (!success) {
       utterance->OnTtsEvent(TTS_EVENT_ERROR, kInvalidCharIndex,
                             GetPlatformImpl()->error());
@@ -313,11 +307,6 @@ void TtsController::SpeakNextUtterance() {
   }
 }
 
-void TtsController::RetrySpeakingQueuedUtterances() {
-  if (current_utterance_ == NULL && !utterance_queue_.empty())
-    SpeakNextUtterance();
-}
-
 void TtsController::ClearUtteranceQueue(bool send_events) {
   while (!utterance_queue_.empty()) {
     Utterance* utterance = utterance_queue_.front();