[bindings] Let NativeValueTraits<T>::nativeValue be variadic function and merge various convers…

Source/bindings/core/v8/V8Binding.cpp

Index: Source/bindings/core/v8/V8Binding.cpp
diff --git a/Source/bindings/core/v8/V8Binding.cpp b/Source/bindings/core/v8/V8Binding.cpp
index a473a16d23097f154966c69e890bd8c03c4a14ac..a7bd2e9c750077eea87308237bfad71786a47713 100644
--- a/Source/bindings/core/v8/V8Binding.cpp
+++ b/Source/bindings/core/v8/V8Binding.cpp
@@ -835,7 +835,7 @@ v8::Isolate* toIsolate(LocalFrame* frame)
     return frame->script().isolate();
 }
 
-PassRefPtr<JSONValue> v8ToJSONValue(v8::Isolate* isolate, v8::Handle<v8::Value> value, int maxDepth)
+JSONValuePtr NativeValueTraits<JSONValuePtr>::nativeValue(v8::Local<v8::Value> value, v8::Isolate* isolate, ExceptionState& exceptionState, int maxDepth)
 {
     if (value.IsEmpty()) {
         ASSERT_NOT_REACHED();
@@ -860,7 +860,7 @@ PassRefPtr<JSONValue> v8ToJSONValue(v8::Isolate* isolate, v8::Handle<v8::Value>
         uint32_t length = array->Length();
         for (uint32_t i = 0; i < length; i++) {
             v8::Local<v8::Value> value = array->Get(v8::Int32::New(isolate, i));
-            RefPtr<JSONValue> element = v8ToJSONValue(isolate, value, maxDepth);
+            RefPtr<JSONValue> element = nativeValue(value, isolate, exceptionState, maxDepth);
             if (!element)
                 return nullptr;
             inspectorArray->pushValue(element);
@@ -877,7 +877,7 @@ PassRefPtr<JSONValue> v8ToJSONValue(v8::Isolate* isolate, v8::Handle<v8::Value>
             // FIXME(yurys): v8::Object should support GetOwnPropertyNames
             if (name->IsString() && !object->HasRealNamedProperty(v8::Handle<v8::String>::Cast(name)))
                 continue;
-            RefPtr<JSONValue> propertyValue = v8ToJSONValue(isolate, object->Get(name), maxDepth);
+            RefPtr<JSONValue> propertyValue = nativeValue(object->Get(name), isolate, exceptionState, maxDepth);
             if (!propertyValue)
                 return nullptr;
             TOSTRING_DEFAULT(V8StringResource<TreatNullAsNullString>, nameString, name, nullptr);