Track all jobs associated with an HttpStreamRequest.

net/log/net_log_event_type_list.h

Index: net/log/net_log_event_type_list.h
diff --git a/net/log/net_log_event_type_list.h b/net/log/net_log_event_type_list.h
index 23088d4b58924740586c3930b6609edb49aabc28..c8b48bff63f2a68f9b613d485b683b65a36ad607 100644
--- a/net/log/net_log_event_type_list.h
+++ b/net/log/net_log_event_type_list.h
@@ -969,6 +969,13 @@ EVENT_TYPE(HTTP_STREAM_REQUEST)
 // Measures the time taken to execute the HttpStreamFactoryImpl::Job
 EVENT_TYPE(HTTP_STREAM_JOB)
 
+// Identifies the NetLog::Source() for a Job started by the Request.
+// The event parameters are:
+//   {
+//      "source_dependency": <Source identifier for Job we started>,
+//   }
+EVENT_TYPE(HTTP_STREAM_REQUEST_STARTED_JOB)
+
 // Identifies the NetLog::Source() for the Job that fulfilled the Request.
 // The event parameters are:
 //   {
@@ -992,6 +999,10 @@ EVENT_TYPE(HTTP_STREAM_JOB_BOUND_TO_REQUEST)
 //   }
 EVENT_TYPE(HTTP_STREAM_REQUEST_PROTO)
 
+// Emitted when a Job is orphaned because the Request was bound to a different
+// Job.

[mmenke, 2015/06/25 23:25:20]

The description could be clearer...Maybe "...because the Job's Request was bound
to another Job that succeeded.  The Job will continue to run to completion."

[davidben, 2015/06/26 16:35:43]

Well, it's not necessarily that the job succeeded. It might have given a special
error like needing client certs. Mentioned running to completion though.

[Huh, related to what we were talking about elsewhere, here's an example where
we depend on lifetimes of lower-level objects being correct.]

+EVENT_TYPE(HTTP_STREAM_JOB_ORPHANED)
+
 // ------------------------------------------------------------------------
 // HttpNetworkTransaction
 // ------------------------------------------------------------------------