Add one more histogram to log how many Request are still pending when

net/http/http_stream_factory_impl_job_controller.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_CONTROLLER_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_CONTROLLER_H_
 
 #include "net/base/host_port_pair.h"
 #include "net/base/privacy_mode.h"
 #include "net/http/http_stream_factory_impl_job.h"
@@ skipping 154 matching lines @@
 
   const NetLogWithSource* GetNetLog() const override;
 
   void MaybeSetWaitTimeForMainJob(const base::TimeDelta& delay) override;
 
   WebSocketHandshakeStreamBase::CreateHelper*
   websocket_handshake_stream_create_helper() override;
 
   bool is_preconnect() const { return is_preconnect_; }
 
+  // Returns true if |this| has a pending request that is not completed.
+  bool HasPendingRequest() const { return request_ != nullptr; }
+
   // Returns true if |this| has a pending main job that is not completed.
   bool HasPendingMainJob() const;
 
   // Returns true if |this| has a pending alternative job that is not completed.
   bool HasPendingAltJob() const;
 
   // Returns the estimated memory usage in bytes.
   size_t EstimateMemoryUsage() const;
 
  private:
@@ skipping 147 matching lines @@
   PrivacyMode privacy_mode_;
 
   const NetLogWithSource net_log_;
 
   base::WeakPtrFactory<JobController> ptr_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_CONTROLLER_H_