Update SpeechRecognizer to indicate if it's done when reporting results.

mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom

Index: mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom
diff --git a/mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom b/mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom
index eb6d55ef7880c37c6d1d0edd0515fef93e857ef6..73c808f697726c3f869fd63848ad4da9f9cc0a8d 100644
--- a/mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom
+++ b/mojo/services/speech_recognizer/interfaces/speech_recognizer.mojom
@@ -31,8 +31,9 @@ interface SpeechRecognizerListener {
   // Called when an error occurs.
   OnRecognizerError(Error error_code);
 
-  // Called when the recognizer receives results.
-  OnResults(array<UtteranceCandidate> results);
+  // Called when the recognizer receives results.  |complete| will be true if
+  // the recognizer has stopped listening with these results.
+  OnResults(array<UtteranceCandidate> results, bool complete);
 
   // Called when sound level changes.
   OnSoundLevelChanged(float rmsDb);