[Net] Propagate priority changes from HttpNetworkTransaction to its request

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 3949f3839ee21aaa01b5d9daa3f0689d4571fa70..4339fd350d77bb69cd11cd9a17d67a652524dcb1 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -9,6 +9,7 @@
 #include <set>
 #include <vector>
 
+#include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_log.h"
@@ -66,8 +67,10 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl :
   size_t num_orphaned_jobs() const { return orphaned_job_set_.size(); }
 
  private:
-  class Request;
-  class Job;
+  FRIEND_TEST_ALL_PREFIXES(HttpStreamFactoryImplRequestTest, SetPriority);
+
+  class NET_EXPORT_PRIVATE Request;
+  class NET_EXPORT_PRIVATE Job;
 
   typedef std::set<Request*> RequestSet;
   typedef std::vector<Request*> RequestVector;