MediaRecorder: make MediaRecorderHandler a MediaStreamObserver

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 3111c09546ea413d373821005e064852abe4b916..ea8fedde1ce20a2817a851783adfdcf1d2e469e7 100644
--- a/components/html_viewer/web_test_delegate_impl.cc
+++ b/components/html_viewer/web_test_delegate_impl.cc
@@ -335,6 +335,10 @@ bool WebTestDelegateImpl::AddMediaStreamAudioSourceAndTrack(
   return false;
 }
 
+void WebTestDelegateImpl::AddMediaStream(blink::WebMediaStream* stream) {
+  NOTIMPLEMENTED();
+}
+
 cc::SharedBitmapManager* WebTestDelegateImpl::GetSharedBitmapManager() {
   NOTIMPLEMENTED();
   return nullptr;