Update ALPN/NPN token from "h2-14" to "h2-15".

net/socket/ssl_client_socket.cc

Index: net/socket/ssl_client_socket.cc
diff --git a/net/socket/ssl_client_socket.cc b/net/socket/ssl_client_socket.cc
index 3184e04e3f79b91f405496e22ad2120d22aaf887..269ca7ee6f34b14d29a5e8d090696eb0f9d74919 100644
--- a/net/socket/ssl_client_socket.cc
+++ b/net/socket/ssl_client_socket.cc
@@ -37,8 +37,8 @@ NextProto SSLClientSocket::NextProtoFromString(
     return kProtoSPDY3;
   } else if (proto_string == "spdy/3.1") {
     return kProtoSPDY31;
-  } else if (proto_string == "h2-14") {
-    // This is the HTTP/2 draft 14 identifier. For internal
+  } else if (proto_string == "h2-15") {
+    // This is the HTTP/2 draft-15 identifier. For internal
     // consistency, HTTP/2 is named SPDY4 within Chromium.
     return kProtoSPDY4;
   } else if (proto_string == "quic/1+spdy/3") {
@@ -60,9 +60,9 @@ const char* SSLClientSocket::NextProtoToString(NextProto next_proto) {
     case kProtoSPDY31:
       return "spdy/3.1";
     case kProtoSPDY4:
-      // This is the HTTP/2 draft 14 identifier. For internal
+      // This is the HTTP/2 draft-15 identifier. For internal
       // consistency, HTTP/2 is named SPDY4 within Chromium.
-      return "h2-14";
+      return "h2-15";
     case kProtoQUIC1SPDY3:
       return "quic/1+spdy/3";
     case kProtoUnknown: