Use struct AlternativeService in OnAltSvc() and OnSpdyAltSvc() methods.

net/spdy/spdy_protocol.cc

Index: net/spdy/spdy_protocol.cc
diff --git a/net/spdy/spdy_protocol.cc b/net/spdy/spdy_protocol.cc
index 58a6b2d64d17ac2176bb1f499475c07576837c01..76e9c6e4594b281b615a4065dce668b42ade5a1f 100644
--- a/net/spdy/spdy_protocol.cc
+++ b/net/spdy/spdy_protocol.cc
@@ -842,9 +842,8 @@ void SpdyContinuationIR::Visit(SpdyFrameVisitor* visitor) const {
 }
 
 SpdyAltSvcIR::SpdyAltSvcIR(SpdyStreamId stream_id)
-    : SpdyFrameWithStreamIdIR(stream_id),
-      max_age_(0),
-      port_(0) {}
+    : SpdyFrameWithStreamIdIR(stream_id) {
+}
 
 void SpdyAltSvcIR::Visit(SpdyFrameVisitor* visitor) const {
   return visitor->VisitAltSvc(*this);