Update from https://crrev.com/303153

net/socket/next_proto.cc

Index: net/socket/next_proto.cc
diff --git a/net/socket/next_proto.cc b/net/socket/next_proto.cc
index c9172365c383fec7e0a1089b3284fb1c0d7aa7cd..4ae4511eddd72b96983067c6a84b3463d0de85d4 100644
--- a/net/socket/next_proto.cc
+++ b/net/socket/next_proto.cc
@@ -15,7 +15,6 @@ NextProtoVector NextProtosHttpOnly() {
 NextProtoVector NextProtosDefaults() {
   NextProtoVector next_protos;
   next_protos.push_back(kProtoHTTP11);
-  next_protos.push_back(kProtoSPDY3);
   next_protos.push_back(kProtoSPDY31);
   return next_protos;
 }
@@ -27,7 +26,6 @@ NextProtoVector NextProtosWithSpdyAndQuic(bool spdy_enabled,
   if (quic_enabled)
     next_protos.push_back(kProtoQUIC1SPDY3);
   if (spdy_enabled) {
-    next_protos.push_back(kProtoSPDY3);
     next_protos.push_back(kProtoSPDY31);
   }
   return next_protos;
@@ -37,7 +35,6 @@ NextProtoVector NextProtosSpdy3() {
   NextProtoVector next_protos;
   next_protos.push_back(kProtoHTTP11);
   next_protos.push_back(kProtoQUIC1SPDY3);
-  next_protos.push_back(kProtoSPDY3);
   return next_protos;
 }
 
@@ -45,7 +42,6 @@ NextProtoVector NextProtosSpdy31() {
   NextProtoVector next_protos;
   next_protos.push_back(kProtoHTTP11);
   next_protos.push_back(kProtoQUIC1SPDY3);
-  next_protos.push_back(kProtoSPDY3);
   next_protos.push_back(kProtoSPDY31);
   return next_protos;
 }
@@ -55,7 +51,6 @@ NextProtoVector NextProtosSpdy31WithSpdy2() {
   next_protos.push_back(kProtoHTTP11);
   next_protos.push_back(kProtoQUIC1SPDY3);
   next_protos.push_back(kProtoDeprecatedSPDY2);
-  next_protos.push_back(kProtoSPDY3);
   next_protos.push_back(kProtoSPDY31);
   return next_protos;
 }
@@ -64,7 +59,6 @@ NextProtoVector NextProtosSpdy4Http2() {
   NextProtoVector next_protos;
   next_protos.push_back(kProtoHTTP11);
   next_protos.push_back(kProtoQUIC1SPDY3);
-  next_protos.push_back(kProtoSPDY3);
   next_protos.push_back(kProtoSPDY31);
   next_protos.push_back(kProtoSPDY4);
   return next_protos;