Add JobController/Job count to UMA histograms when the count hits limit

net/http/http_stream_factory_impl.h

Index: net/http/http_stream_factory_impl.h
diff --git a/net/http/http_stream_factory_impl.h b/net/http/http_stream_factory_impl.h
index ce29d1f737245db52d205d9bb0f360e4afb51d14..503764c42550d4e52722ad48734b5eabc7c5dcdd 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -171,6 +171,11 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
   // priorities.
   bool ProxyServerSupportsPriorities(const ProxyInfo& proxy_info) const;
 
+  // Adds the count of JobControllers that are not completed to UMA histogram if
+  // the count is a multiple of 100: 100, 200, 400, etc. Break down
+  // JobControllers count based on the type of JobController.
+  void AddJobControllerCountToHistograms() const;
+
   HttpNetworkSession* const session_;
 
   // All Requests/Preconnects are assigned with a JobController to manage