Add layout tests for the audio component of MediaStream Recording.

components/html_viewer/web_test_delegate_impl.cc

Index: components/html_viewer/web_test_delegate_impl.cc
diff --git a/components/html_viewer/web_test_delegate_impl.cc b/components/html_viewer/web_test_delegate_impl.cc
index a97a95ff3a47d0d208896770c21906523bde93fa..9aba1a6ffa8222514da445193e4ea9086f66acdf 100644
--- a/components/html_viewer/web_test_delegate_impl.cc
+++ b/components/html_viewer/web_test_delegate_impl.cc
@@ -318,7 +318,13 @@ void WebTestDelegateImpl::ResetPermissions() {
   NOTIMPLEMENTED();
 }
 
-bool WebTestDelegateImpl::AddMediaStreamSourceAndTrack(
+bool WebTestDelegateImpl::AddMediaStreamVideoSourceAndTrack(
+    blink::WebMediaStream* stream) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool WebTestDelegateImpl::AddMediaStreamAudioSourceAndTrack(
     blink::WebMediaStream* stream) {
   NOTIMPLEMENTED();
   return false;