Revert "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 b966885cd30a62dbebc37e6093cb2d678698f1ed..503786d80983c239beac32e1c5ea299ce4caeb24 100644
--- a/chrome/browser/speech/tts_controller.cc
+++ b/chrome/browser/speech/tts_controller.cc
@@ -196,6 +196,14 @@ 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());
@@ -306,6 +314,11 @@ 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();