Added kV8MajorVersion.

third_party/WebKit/Source/web/WebSerializedScriptValueVersion.cpp

Index: third_party/WebKit/Source/web/WebSerializedScriptValueVersion.cpp
diff --git a/third_party/WebKit/Source/web/WebSerializedScriptValueVersion.cpp b/third_party/WebKit/Source/web/WebSerializedScriptValueVersion.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..880652dafc897e8f6d195178c2d54d70030869eb
--- /dev/null
+++ b/third_party/WebKit/Source/web/WebSerializedScriptValueVersion.cpp
@@ -0,0 +1,21 @@
+// Copyright 2017 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.
+
+#include "public/web/WebSerializedScriptValueVersion.h"
+
+#include "bindings/core/v8/SerializedScriptValue.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+
+// To ensure that the public constant matches the internal constant.
+static_assert(kSerializedScriptValueVersion ==
+              SerializedScriptValue::wireFormatVersion,
+              "Serialized script value constants mismatch.");
+
+static_assert(kV8MajorVersion ==
+              V8_MAJOR_VERSION,
+              "V8 major version constants mismatch.");
+
+} // namespace blink