Add a probability to Alternate-Protocol support.

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 61 matching lines @@
 using base::TimeDelta;
 
 namespace net {
 
 namespace {
 
 void ProcessAlternateProtocol(
     HttpNetworkSession* session,
     const HttpResponseHeaders& headers,
     const HostPortPair& http_host_port_pair) {
+  if (!headers.HasHeader(kAlternateProtocolHeader))
+    return;
+
+  std::vector<std::string> alternate_protocol_values;
+  void* iter = NULL;
   std::string alternate_protocol_str;
-
-  if (!headers.EnumerateHeader(NULL, kAlternateProtocolHeader,
-                               &alternate_protocol_str)) {
-    // Header is not present.
-    return;
+  while (headers.EnumerateHeader(&iter, kAlternateProtocolHeader,
+                                 &alternate_protocol_str)) {
+    alternate_protocol_values.push_back(alternate_protocol_str);
   }
 
   session->http_stream_factory()->ProcessAlternateProtocol(
       session->http_server_properties(),
-      alternate_protocol_str,
+      alternate_protocol_values,
       http_host_port_pair,
       *session);
 }
 
 // Returns true if |error| is a client certificate authentication error.
 bool IsClientCertificateError(int error) {
   switch (error) {
     case ERR_BAD_SSL_CLIENT_AUTH_CERT:
     case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED:
     case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY:
@@ skipping 1478 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net