Track SDP parse errors for SLD in chrome://webrtc-internals

content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc

Index: content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc
diff --git a/content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc b/content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc
index eaed4f8a1758fc243055d5ebd827d19af67f7f0d..121a0ae1bf31667f2930c76ed775d678130dda9f 100644
--- a/content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/mock_peer_connection_dependency_factory.cc
@@ -360,6 +360,8 @@ MockPeerConnectionDependencyFactory::CreateSessionDescription(
     const std::string& type,
     const std::string& sdp,
     webrtc::SdpParseError* error) {
+  if (fail_to_create_session_description_)
+    return nullptr;
   return new MockSessionDescription(type, sdp);
 }
 
@@ -376,4 +378,9 @@ MockPeerConnectionDependencyFactory::GetWebRtcSignalingThread() const {
   return signaling_thread_.task_runner();
 }
 
+void MockPeerConnectionDependencyFactory::SetFailToCreateSessionDescription(
+    bool fail) {
+  fail_to_create_session_description_ = fail;
+}
+
 }  // namespace content