Create a separate NetLog source type QUIC_STREAM_FACTORY_JOB

net/quic/chromium/quic_stream_factory.cc

Index: net/quic/chromium/quic_stream_factory.cc
diff --git a/net/quic/chromium/quic_stream_factory.cc b/net/quic/chromium/quic_stream_factory.cc
index 0f855f0aad2fc91b2dbd342ed323617889c9626e..2543ac2c8c7fbb2fd4d9d547055b8ca26637e058 100644
--- a/net/quic/chromium/quic_stream_factory.cc
+++ b/net/quic/chromium/quic_stream_factory.cc
@@ -386,12 +386,26 @@ QuicStreamFactory::Job::Job(QuicStreamFactory* factory,
           was_alternative_service_recently_broken),
       server_info_(std::move(server_info)),
       started_another_job_(false),
-      net_log_(net_log),
+      net_log_(
+          NetLogWithSource::Make(net_log.net_log(),
+                                 NetLogSourceType::QUIC_STREAM_FACTORY_JOB)),
       num_sent_client_hellos_(0),
       session_(nullptr),
-      weak_factory_(this) {}
+      weak_factory_(this) {
+  std::string server_id = key_.server_id().ToString();

[eroman, 2017/04/07 01:55:29]

optional: If you want to avoid constructing this string in the case when logging
is not enabled (in other words the default case), consider adding a separate
callback function that internalizes this.

I'll leave it up to you if you think it is worth it (just a couple lines of code
to do so).

[Zhongyi Shi, 2017/04/07 03:08:53]

Thanks for the suggestion, change to use a separate callback. 

+  net_log_.BeginEvent(NetLogEventType::QUIC_STREAM_FACTORY_JOB,
+                      NetLog::StringCallback("server_id", &server_id));
+  // Associate |net_log_| with |net_log|.
+  net_log_.AddEvent(
+      NetLogEventType::QUIC_STREAM_FACTORY_JOB_BOUND_TO_HTTP_STREAM_JOB,
+      net_log.source().ToEventParametersCallback());
+  net_log.AddEvent(
+      NetLogEventType::HTTP_STREAM_JOB_BOUND_TO_QUIC_STREAM_FACTORY_JOB,
+      net_log_.source().ToEventParametersCallback());
+}
 
 QuicStreamFactory::Job::~Job() {
+  net_log_.EndEvent(NetLogEventType::QUIC_STREAM_FACTORY_JOB);
   DCHECK(callback_.is_null());
 
   // If disk cache has a pending WaitForDataReadyCallback, cancel that callback.