Adding support for the SpeechRecognition.maxAlternatives JS API parameter (Speech CL2.5)

content/renderer/speech_recognition_dispatcher.cc

Index: content/renderer/speech_recognition_dispatcher.cc
diff --git a/content/renderer/speech_recognition_dispatcher.cc b/content/renderer/speech_recognition_dispatcher.cc
index 8bc38b5c168854d5bc5c9641245149a8a3e14d07..6b8e4be65b890682594de60851f1e0b150d9fbf4 100644
--- a/content/renderer/speech_recognition_dispatcher.cc
+++ b/content/renderer/speech_recognition_dispatcher.cc
@@ -73,6 +73,7 @@ void SpeechRecognitionDispatcher::start(
   }
   msg_params.language = UTF16ToUTF8(params.language());
   msg_params.is_one_shot = !params.continuous();
+  msg_params.max_hypotheses = params.maxAlternatives();
   msg_params.origin_url = params.origin().toString().utf8();
   msg_params.render_view_id = routing_id();
   msg_params.request_id = GetOrCreateIDForHandle(handle);