Expose the ValueSerializer data format version as a compile-time constant.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 1011 matching lines @@
 
   configs = [ ":internal_config" ]
 }
 
 # This is split out to be a non-code containing target that the Chromium browser
 # DLL can depend upon to get only a version string.
 v8_header_set("v8_version") {
   configs = [ ":internal_config" ]
 
   sources = [
+    "include/v8-value-serializer-version.h",
     "include/v8-version-string.h",
     "include/v8-version.h",
   ]
 }
 
 v8_source_set("v8_base") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   sources = [
     "//base/trace_event/common/trace_event_common.h",
@@ skipping 2199 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_compile_fuzzer") {
 }