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

net/http/http_stream_factory_impl_job_controller.h

Index: net/http/http_stream_factory_impl_job_controller.h
diff --git a/net/http/http_stream_factory_impl_job_controller.h b/net/http/http_stream_factory_impl_job_controller.h
index ab829e8fedd809864c14701e9570e644c0e406d6..a8c255d29880a6da70c44501c2346028a9c0dfd7 100644
--- a/net/http/http_stream_factory_impl_job_controller.h
+++ b/net/http/http_stream_factory_impl_job_controller.h
@@ -218,6 +218,10 @@ class HttpStreamFactoryImpl::JobController
   // |alternative_job_| has failed or |main_job_wait_time_| elapsed.
   void MaybeResumeMainJob(Job* job, const base::TimeDelta& delay);
 
+  // Posts a task to resume the main job after |delay|.
+  void ResumeMainJobLater(const base::TimeDelta& delay);
+
+  // Resumes the main job immediately.
   void ResumeMainJob();
 
   // Returns true if QUIC is whitelisted for |host|.