Add net-log entries when HttpStream jobs are forced to wait, and when they're delayed and resumed.

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 893f16e08b8bc666e0a351b31a546b90b16bbde8..146b86010bcba4f14eff6e1fe13755a7b7218193 100644
--- a/net/log/net_log_event_type_list.h
+++ b/net/log/net_log_event_type_list.h
@@ -1055,6 +1055,14 @@ EVENT_TYPE(HTTP_STREAM_REQUEST)
 //   }
 EVENT_TYPE(HTTP_STREAM_JOB)
 
+// Measures the time and HttpStreamFactoryImpl::Job spends waiting for
+// another job.
+// The event parameters are:
+//   {
+//      "should_wait": <True if the job needs to wait>,
+//   }
+EVENT_TYPE(HTTP_STREAM_JOB_WAITING)
+
 // Identifies the NetLogSource() for a Job started by the Request.
 // The event parameters are:
 //   {
@@ -1095,12 +1103,18 @@ EVENT_TYPE(HTTP_STREAM_REQUEST_PROTO)
 // Job. The orphaned Job will continue to run to completion.
 EVENT_TYPE(HTTP_STREAM_JOB_ORPHANED)
 
-// Emitted when a job is asked to resume after non-zero microseconds.
+// Emitted when a job is delayed.
 //   {
-//     "resume_after_ms": <Number of milliseconds until job will be unblocked>
+//     "delay_ms": <Number of milliseconds until job will be resumed>
 //   }
 EVENT_TYPE(HTTP_STREAM_JOB_DELAYED)
 
+// Emitted when a job is asked to resume after non-zero microseconds.
+//   {
+//     "delay_ms": <Number of milliseconds the job was delayed before resuming>
+//   }
+EVENT_TYPE(HTTP_STREAM_JOB_RESUMED)
+
 // Marks the start/end of a HttpStreamFactoryImpl::JobController.
 // The following parameters are attached:
 //   {