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

third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp
index e13a7cec9aade99e0cd9e08e16e03d48d9ab0c71..09fbd3153887d3ba40332704f9694937b3141132 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestCallbackFunctions.cpp
@@ -13,7 +13,9 @@
 
 #include "bindings/core/v8/AnyCallbackFunctionOptionalAnyArg.h"
 #include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/IDLTypes.h"
 #include "bindings/core/v8/LongCallbackFunction.h"
+#include "bindings/core/v8/NativeValueTraitsImpl.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
 #include "bindings/core/v8/VoidCallbackFunction.h"
@@ -326,4 +328,8 @@ TestCallbackFunctions* V8TestCallbackFunctions::toImplWithTypeCheck(v8::Isolate*
   return hasInstance(value, isolate) ? toImpl(v8::Local<v8::Object>::Cast(value)) : nullptr;
 }
 
+TestCallbackFunctions* NativeValueTraits<TestCallbackFunctions>::nativeValue(v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState) {
+  return V8TestCallbackFunctions::toImplWithTypeCheck(isolate, value);
+}
+
 }  // namespace blink