Merge histograms from providers into StatisticsRecorder for display.

content/browser/histogram_internals_request_job.h

Index: content/browser/histogram_internals_request_job.h
diff --git a/content/browser/histogram_internals_request_job.h b/content/browser/histogram_internals_request_job.h
index 63ce622e405a9a80bd4a61523d2ccd64d19aecde..130122a8529c1652b671b913fc85ccc5c3fe07f7 100644
--- a/content/browser/histogram_internals_request_job.h
+++ b/content/browser/histogram_internals_request_job.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "net/url_request/url_request_simple_job.h"
 
 namespace content {
@@ -17,17 +18,24 @@ class HistogramInternalsRequestJob : public net::URLRequestSimpleJob {
   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);
 };