Add support for parsing IETF format of alt-svc header advertising QUIC

Merge internal change: 167596476

Change-Id: Ibe5d7e9f33bc4013692883cfed3dafaf001390ba
Reviewed-on: https://chromium-review.googlesource.com/677579
Commit-Queue: Ryan Hamilton <[email protected]>
Reviewed-by: Bence Béky <[email protected]>
Cr-Commit-Position: refs/heads/master@{#503875}
diff --git a/net/BUILD.gn b/net/BUILD.gn
index a1bcf23..1c165625 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1616,6 +1616,7 @@
       "spdy/platform/impl/spdy_ptr_util_impl.h",
       "spdy/platform/impl/spdy_string_impl.h",
       "spdy/platform/impl/spdy_string_piece_impl.h",
+      "spdy/platform/impl/spdy_string_utils_impl.cc",
       "spdy/platform/impl/spdy_string_utils_impl.h",
       "ssl/client_cert_store.h",
       "ssl/client_cert_store_mac.cc",