Fix for keyboard mic: set flag in AudioEntry so that we unregister.

content/browser/renderer_host/media/audio_input_renderer_host.cc

Index: content/browser/renderer_host/media/audio_input_renderer_host.cc
diff --git a/content/browser/renderer_host/media/audio_input_renderer_host.cc b/content/browser/renderer_host/media/audio_input_renderer_host.cc
index b7ae57de0eeab5bcedf9a01b9ee36406a8eae228..83aa43cf4ba9322da6a754578030631b177f0d03 100644
--- a/content/browser/renderer_host/media/audio_input_renderer_host.cc
+++ b/content/browser/renderer_host/media/audio_input_renderer_host.cc
@@ -414,6 +414,13 @@ void AudioInputRendererHost::DoCreateStream(
     oss << ", AGC=" << config.automatic_gain_control;
   }
 
+#if defined(OS_CHROMEOS)
+  if (config.params.channel_layout() ==
+          media::CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC) {
+    entry->has_keyboard_mic_ = true;
+  }
+#endif
+
   MediaStreamManager::SendMessageToNativeLog(oss.str());
   DVLOG(1) << oss.str();