Merge histograms from providers into StatisticsRecorder for display.

content/browser/histogram_internals_request_job.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_HISTOGRAM_INTERNALS_REQUEST_JOB_H_
 #define CONTENT_BROWSER_HISTOGRAM_INTERNALS_REQUEST_JOB_H_
 
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "net/url_request/url_request_simple_job.h"
 
 namespace content {
 
 class HistogramInternalsRequestJob : public net::URLRequestSimpleJob {
  public:
   HistogramInternalsRequestJob(net::URLRequest* request,
                                net::NetworkDelegate* network_delegate);
 
+  // URLRequestSimpleJob:

[Alexei Svitkine (slow), 2017/01/27 16:22:03]

Nit: net::

[bcwhite, 2017/01/27 18:05:31]

Done.

+  void Start() override;
   int GetData(std::string* mime_type,
               std::string* charset,
               std::string* data,
               const net::CompletionCallback& callback) const override;
 
  private:
-  ~HistogramInternalsRequestJob() override {}
+  ~HistogramInternalsRequestJob() override;
+
+  // Starts the real URL request.
+  void StartUrlRequest();
 
   // The string to select histograms which have |path_| as a substring.
   std::string path_;
 
+  base::WeakPtrFactory<HistogramInternalsRequestJob> weak_factory_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(HistogramInternalsRequestJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_HISTOGRAM_INTERNALS_REQUEST_JOB_H_