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

net/http/http_server_properties.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_SERVER_PROPERTIES_H_
 #define NET_HTTP_HTTP_SERVER_PROPERTIES_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 32 matching lines @@
   // Alternate Protocol was not used because no Alternate-Protocol information
   // was available when the request was issued, but an Alternate-Protocol header
   // was present in the response.
   ALTERNATE_PROTOCOL_USAGE_MAPPING_MISSING = 3,
   // Alternate Protocol was not used because it was marked broken.
   ALTERNATE_PROTOCOL_USAGE_BROKEN = 4,
   // Maximum value for the enum.
   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,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_QUIC_STREAM_FACTORY = 1,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT = 2,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN = 3,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX,
 };
 
 // Log a histogram to reflect |location|.
@@ skipping 308 matching lines @@
   virtual void SetMaxServerConfigsStoredInProperties(
       size_t max_server_configs_stored_in_properties) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_H_