V8StringResource's v8StringToWebCoreString() should return a StringType

Source/bindings/v8/V8StringResource.cpp

Index: Source/bindings/v8/V8StringResource.cpp
diff --git a/Source/bindings/v8/V8StringResource.cpp b/Source/bindings/v8/V8StringResource.cpp
index 888d1c24937e1649d2beee3f11cca6dd2c23a67d..bce62d4c2faaf394d35fb3f8dddbb8d931748571 100644
--- a/Source/bindings/v8/V8StringResource.cpp
+++ b/Source/bindings/v8/V8StringResource.cpp
@@ -148,7 +148,7 @@ StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode
 
     int length = v8String->Length();
     if (UNLIKELY(!length))
-        return String("");
+        return StringType("");
 
     bool oneByte = v8String->ContainsOnlyOneByte();
     StringType result(oneByte ? StringTraits<StringType>::template fromV8String<true>(v8String, length) : StringTraits<StringType>::template fromV8String<false>(v8String, length));