Forward capturer id from desktop process to network process

remoting/host/desktop_session_agent.cc

Index: remoting/host/desktop_session_agent.cc
diff --git a/remoting/host/desktop_session_agent.cc b/remoting/host/desktop_session_agent.cc
index 94af3be8af9ae2d51647405a67dd4e340eba66e8..2c1baf6940f0b8187d876a0c05b3c4604568c35b 100644
--- a/remoting/host/desktop_session_agent.cc
+++ b/remoting/host/desktop_session_agent.cc
@@ -320,6 +320,7 @@ void DesktopSessionAgent::OnCaptureResult(
     serialized_frame.dimensions = frame->size();
     serialized_frame.capture_time_ms = frame->capture_time_ms();
     serialized_frame.dpi = frame->dpi();
+    serialized_frame.capturer_id = frame->capturer_id();
     for (webrtc::DesktopRegion::Iterator i(frame->updated_region());
          !i.IsAtEnd(); i.Advance()) {
       serialized_frame.dirty_region.push_back(i.rect());