WIP bindings: Add support for the record<K,V> WebIDL type.

third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h

Index: third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h
diff --git a/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h b/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h
index 7b9e423bc28874c30a7ab5394cfbd684fcd1b3f4..a486bb1608a0aac5a4deab745b24fe22119e8424 100644
--- a/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h
+++ b/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.h
@@ -14,6 +14,7 @@
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/NativeValueTraits.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
@@ -74,9 +75,15 @@ inline void v8SetReturnValue(const CallbackInfo& callbackInfo, BooleanOrString&
 
 template <>
 struct NativeValueTraits<BooleanOrString> {
+  using ImplType = BooleanOrString;
   MODULES_EXPORT static BooleanOrString nativeValue(v8::Isolate*, v8::Local<v8::Value>, ExceptionState&);
 };
 
+template <>
+struct V8TypeOf<BooleanOrString> {
+  typedef V8BooleanOrString Type;
+};
+
 }  // namespace blink
 
 // We need to set canInitializeWithMemset=true because HeapVector supports