bindings: Add C++ versions of WebIDL types and generalize NativeValueTraits.

third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h

Index: third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
index ceb9d63e64389f54d7ef4cec4ed2bf23c86c38de..b610b640aedbcd9a0e3b4efdc3e24e4c63c62cee 100644
--- a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
+++ b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
@@ -33,6 +33,7 @@
 
 #include <memory>
 
+#include "bindings/core/v8/NativeValueTraits.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/Transferables.h"
 #include "core/CoreExport.h"
@@ -182,6 +183,18 @@ class CORE_EXPORT SerializedScriptValue
   intptr_t m_externallyAllocatedMemory;
 };
 
+template <>
+struct NativeValueTraits<SerializedScriptValue>
+    : public NativeValueTraitsBase<SerializedScriptValue> {
+  CORE_EXPORT static inline PassRefPtr<SerializedScriptValue> nativeValue(
+      v8::Isolate* isolate,
+      v8::Local<v8::Value> value,
+      ExceptionState& exceptionState) {
+    return SerializedScriptValue::serialize(isolate, value, nullptr, nullptr,
+                                            exceptionState);
+  }
+};
+
 }  // namespace blink
 
 #endif  // SerializedScriptValue_h