Remove the dependency of Extension API from tts_chromeos

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 658c9f58cd0574838607dc059075a11a970d4fa7..aaaea711951326a8aac78f2077980d4c1f7eada7 100644
--- a/chrome/browser/speech/tts_controller.h
+++ b/chrome/browser/speech/tts_controller.h
@@ -98,6 +98,9 @@ class TtsEngineDelegate {
 
   // Resume speaking this utterance.
   virtual void Resume(Utterance* utterance) = 0;
+
+  // Load the built-in component extension for ChromeOS.
+  virtual bool LoadBuiltInTtsExtension(Profile* profile) = 0;
 };
 
 // Class that wants to receive events on utterances.
@@ -325,6 +328,10 @@ class TtsController {
   // extensions.
   virtual void SetTtsEngineDelegate(TtsEngineDelegate* delegate) = 0;
 
+  // Get the delegate that processes TTS requests with user-installed
+  // extensions.
+  virtual TtsEngineDelegate* GetTtsEngineDelegate() = 0;
+
   // For unit testing.
   virtual void SetPlatformImpl(TtsPlatformImpl* platform_impl) = 0;
   virtual int QueueSize() = 0;