Add network service thread in tracing

Change-Id: I160ed2450bdc3b99e1ac7047a75e69928b8f679a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622893
Commit-Queue: ssid <ssid@chromium.org>
Commit-Queue: oysteine <oysteine@chromium.org>
Auto-Submit: ssid <ssid@chromium.org>
Reviewed-by: oysteine <oysteine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842277}

services/tracing/public/cpp/perfetto/track_event_thread_local_event_sink.cc

@@ -133,6 +133,8 @@ ChromeThreadDescriptor::ThreadType GetThreadType(
     return ChromeThreadDescriptor::THREAD_MAIN;
   } else if (base::MatchPattern(thread_name, "Chrome*IOThread")) {
     return ChromeThreadDescriptor::THREAD_IO;
+  } else if (base::MatchPattern(thread_name, "NetworkService")) {
+    return ChromeThreadDescriptor::THREAD_NETWORK_SERVICE;
   } else if (base::MatchPattern(thread_name, "ThreadPoolForegroundWorker*")) {
     return ChromeThreadDescriptor::THREAD_POOL_FG_WORKER;
   } else if (base::MatchPattern(thread_name, "ThreadPoolBackgroundWorker*")) {