Automatically trigger installation of high-quality speech synthesis extension.

chrome/browser/speech/tts_platform.cc

Index: chrome/browser/speech/tts_platform.cc
diff --git a/chrome/browser/speech/tts_platform.cc b/chrome/browser/speech/tts_platform.cc
index 6b51bdc9167571519b7b43fefa1c367a69d70cde..3942eff013b9af552b175dd349dfddbd6a92e565 100644
--- a/chrome/browser/speech/tts_platform.cc
+++ b/chrome/browser/speech/tts_platform.cc
@@ -6,10 +6,6 @@
 
 #include <string>
 
-bool TtsPlatformImpl::LoadBuiltInTtsExtension(Profile* profile) {
-  return false;
-}
-
 std::string TtsPlatformImpl::error() {
   return error_;
 }
@@ -21,3 +17,7 @@ void TtsPlatformImpl::clear_error() {
 void TtsPlatformImpl::set_error(const std::string& error) {
   error_ = error;
 }
+
+void TtsPlatformImpl::WillSpeakUtteranceWithVoice(const Utterance* utterance,
+                                                  const VoiceData& voice_data) {
+}