Observe v= parameter when processing Alternative Services header.

net/http/http_stream_factory.cc

Index: net/http/http_stream_factory.cc
diff --git a/net/http/http_stream_factory.cc b/net/http/http_stream_factory.cc
index 003933b71fa6bcb96ac6b42a0e2c0a5b81b82d7f..9364f8c0471c2ec6d6a43194939f8a992d69f0e0 100644
--- a/net/http/http_stream_factory.cc
+++ b/net/http/http_stream_factory.cc
@@ -13,6 +13,7 @@
 #include "net/base/host_port_pair.h"
 #include "net/base/port_util.h"
 #include "net/http/http_network_session.h"
+#include "net/quic/quic_protocol.h"
 #include "net/spdy/spdy_alt_svc_wire_format.h"
 #include "url/gurl.h"
 
@@ -54,6 +55,23 @@ void HttpStreamFactory::ProcessAlternativeService(
         !IsPortValid(alternative_service_entry.port)) {
       continue;
     }
+    // Check if QUIC version is supported.
+    if (protocol == QUIC && !alternative_service_entry.version.empty()) {
+      SpdyAltSvcWireFormat::VersionVector::const_iterator begin =
+          alternative_service_entry.version.begin();
+      SpdyAltSvcWireFormat::VersionVector::const_iterator end =
+          alternative_service_entry.version.end();
+      bool match_found = false;
+      for (QuicVersion supported : session.params().quic_supported_versions) {
+        if (std::find(begin, end, static_cast<uint16>(supported)) != end) {
+          match_found = true;

[Ryan Hamilton, 2015/10/29 20:07:23]

Up to you, but instead of using std::find, I wonder if would be easier to do:
  for (uint16 alt_version : alternative_service_entry) {
    if (supported == alt_version) {
      match_found = true;
      break;
    }
  }

I hate iterators, but I have lots of pet peeves :> You don't need to share my
peeves :>

+          break;
+        }
+      }
+      if (!match_found) {
+        continue;
+      }
+    }
     AlternativeService alternative_service(protocol,
                                            alternative_service_entry.host,
                                            alternative_service_entry.port);