Job Controller: clean up metrics logging about the job racing result

net/http/http_server_properties.h

Index: net/http/http_server_properties.h
diff --git a/net/http/http_server_properties.h b/net/http/http_server_properties.h
index f0ffcc5d7770d09e7b924ea23bd3be5193242b78..fd7be05d0fa3676ad640d7195b710b96d732db54 100644
--- a/net/http/http_server_properties.h
+++ b/net/http/http_server_properties.h
@@ -50,8 +50,20 @@ enum AlternateProtocolUsage {
   ALTERNATE_PROTOCOL_USAGE_MAX,
 };
 
+enum AlternativeProxyUsage {

[tbansal1, 2016/09/23 00:02:07]

nit: this enum can also move to anonymous namespace in .cc file.

+  // Alternative Proxy was used without racing a normal connection.
+  ALTERNATIVE_PROXY_USAGE_NO_RACE = 0,
+  // Alternative Proxy was used by winning a race with a normal connection.
+  ALTERNATIVE_PROXY_USAGE_WON_RACE = 1,
+  // Alternative Proxy was not used by losing a race with a normal connection.
+  ALTERNATIVE_PROXY_USAGE_LOST_RACE = 2,
+  // Maximum value for the enum.
+  ALTERNATIVE_PROXY_USAGE_MAX,
+};
+
 // Log a histogram to reflect |usage|.
-NET_EXPORT void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage);
+NET_EXPORT void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage,
+                                                bool proxy_server_used);
 
 enum BrokenAlternateProtocolLocation {
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB = 0,