Log the QUIC priority when sending requests.

net/quic/quic_http_utils.h

Index: net/quic/quic_http_utils.h
diff --git a/net/quic/quic_http_utils.h b/net/quic/quic_http_utils.h
index c7e031ae605e1565c06077b2118b079faacb9996..a62b9ef3bd8e0afdf8336540f6a51dfda9813e03 100644
--- a/net/quic/quic_http_utils.h
+++ b/net/quic/quic_http_utils.h
@@ -5,9 +5,11 @@
 #ifndef NET_QUIC_QUIC_HTTP_UTILS_H_
 #define NET_QUIC_QUIC_HTTP_UTILS_H_
 
+#include "base/values.h"
 #include "net/base/net_export.h"
 #include "net/base/request_priority.h"
 #include "net/quic/quic_protocol.h"
+#include "net/spdy/spdy_header_block.h"
 
 namespace net {
 
@@ -17,6 +19,13 @@ NET_EXPORT_PRIVATE QuicPriority ConvertRequestPriorityToQuicPriority(
 NET_EXPORT_PRIVATE RequestPriority ConvertQuicPriorityToRequestPriority(
     QuicPriority priority);
 
+// Converts a SpdyHeaderBlock and priority into NetLog event parameters.  Caller
+// takes ownership of returned value.
+NET_EXPORT base::Value* QuicRequestNetLogCallback(
+    const SpdyHeaderBlock* headers,
+    QuicPriority priority,
+    NetLog::LogLevel log_level);
+
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_HTTP_UTILS_H_