Automatically trigger installation of high-quality speech synthesis extension.

chrome/browser/speech/tts_platform.h

Index: chrome/browser/speech/tts_platform.h
diff --git a/chrome/browser/speech/tts_platform.h b/chrome/browser/speech/tts_platform.h
index 4b57fd49e46bf735b14ff4139446e22096cb9a83..bce9693604f3273f64d6c13009f56d6bb15a7ec3 100644
--- a/chrome/browser/speech/tts_platform.h
+++ b/chrome/browser/speech/tts_platform.h
@@ -18,13 +18,6 @@ class TtsPlatformImpl {
   // Returns true if this platform implementation is supported and available.
   virtual bool PlatformImplAvailable() = 0;
 
-  // Some platforms may provide a built-in TTS extension. Returns true
-  // if the extension was not previously loaded and is now loading, and
-  // false if it's already loaded or if there's no extension to load.
-  // Will call TtsController::RetrySpeakingQueuedUtterances when
-  // the extension finishes loading.
-  virtual bool LoadBuiltInTtsExtension(Profile* profile);
-
   // Speak the given utterance with the given parameters if possible,
   // and return true on success. Utterance will always be nonempty.
   // If rate, pitch, or volume are -1.0, they will be ignored.
@@ -56,6 +49,11 @@ class TtsPlatformImpl {
   // Resume speaking the current utterance, if it was paused.
   virtual void Resume() = 0;
 
+  // Allows the platform to monitor speech commands and the voices used
+  // for each one.
+  virtual void WillSpeakUtteranceWithVoice(const Utterance* utterance,
+                                           const VoiceData& voice_data);
+
   virtual std::string error();
   virtual void clear_error();
   virtual void set_error(const std::string& error);