Add Pause and Resume to Web TTS & Extension TTS APIs

chrome/browser/speech/extension_api/tts_engine_extension_api.h

Index: chrome/browser/speech/extension_api/tts_engine_extension_api.h
diff --git a/chrome/browser/speech/extension_api/tts_engine_extension_api.h b/chrome/browser/speech/extension_api/tts_engine_extension_api.h
index b87de3a669e5c1f8b4d7f52dabd44af65bd0ec30..b77f4d979346869f13b1bee2b052ecde417e2627 100644
--- a/chrome/browser/speech/extension_api/tts_engine_extension_api.h
+++ b/chrome/browser/speech/extension_api/tts_engine_extension_api.h
@@ -24,6 +24,8 @@ class Extension;
 namespace tts_engine_events {
 extern const char kOnSpeak[];
 extern const char kOnStop[];
+extern const char kOnPause[];
+extern const char kOnResume[];
 }
 
 // Return a list of all available voices registered by extensions.
@@ -47,6 +49,12 @@ void ExtensionTtsEngineSpeak(Utterance* utterance,
 // associated with this utterance.
 void ExtensionTtsEngineStop(Utterance* utterance);
 
+// Pause in the middle of speaking this utterance.
+void ExtensionTtsEnginePause(Utterance* utterance);
+
+// Resume speaking this utterance.
+void ExtensionTtsEngineResume(Utterance* utterance);
+
 // Hidden/internal extension function used to allow TTS engine extensions
 // to send events back to the client that's calling tts.speak().
 class ExtensionTtsEngineSendTtsEventFunction : public SyncExtensionFunction {