Add Pause and Resume to Web TTS & Extension TTS APIs

chrome/browser/speech/extension_api/tts_extension_api_constants.cc

Index: chrome/browser/speech/extension_api/tts_extension_api_constants.cc
diff --git a/chrome/browser/speech/extension_api/tts_extension_api_constants.cc b/chrome/browser/speech/extension_api/tts_extension_api_constants.cc
index 3568a8d5d782d1c5e2e75f102de012ac464a351e..7b8c45bbe4ca499791c7b77130ec48a00b6b780b 100644
--- a/chrome/browser/speech/extension_api/tts_extension_api_constants.cc
+++ b/chrome/browser/speech/extension_api/tts_extension_api_constants.cc
@@ -35,6 +35,8 @@ const char kEventTypeMarker[] = "marker";
 const char kEventTypeInterrupted[] = "interrupted";
 const char kEventTypeCancelled[] = "cancelled";
 const char kEventTypeError[] = "error";
+const char kEventTypePause[] = "pause";
+const char kEventTypeResume[] = "resume";
 
 const char kErrorUndeclaredEventType[] =
     "Cannot send an event type that is not declared in the extension manifest.";
@@ -44,5 +46,8 @@ const char kErrorInvalidGender[] = "Invalid gender.";
 const char kErrorInvalidRate[] = "Invalid rate.";
 const char kErrorInvalidPitch[] = "Invalid pitch.";
 const char kErrorInvalidVolume[] = "Invalid volume.";
+const char kErrorMissingPauseOrResume[] =
+    "A TTS engine extension should either listen for both onPause and onResume "
+    "events, or neither.";
 
 }  // namespace tts_extension_api_constants.