First phase of migration to new indexed property query callbacks.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 4e20959a7a8c4b7bb6dae90feaba0e8e346865e0..aabb0413a4cb4d60cc1a890e02d8773bc8437fc0 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -5823,16 +5823,24 @@ bool JSObject::HasElementWithInterceptor(JSObject* receiver, uint32_t index) {
   CustomArguments args(interceptor->data(), receiver, this);
   v8::AccessorInfo info(args.end());
   if (!interceptor->query()->IsUndefined()) {
-    v8::IndexedPropertyQuery query =
-        v8::ToCData<v8::IndexedPropertyQuery>(interceptor->query());
+    v8::IndexedPropertyQueryImpl query =
+        v8::ToCData<v8::IndexedPropertyQueryImpl>(interceptor->query());
     LOG(ApiIndexedPropertyAccess("interceptor-indexed-has", this, index));
-    v8::Handle<v8::Boolean> result;
+    v8::Handle<v8::Value> result;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
       result = query(index, info);
     }
-    if (!result.IsEmpty()) return result->IsTrue();
+    if (!result.IsEmpty()) {
+      // IsBoolean check would be removed when transition to new API is over.
+      if (result->IsBoolean()) {
+        return result->IsTrue() ? true : false;
+      } else {
+        ASSERT(result->IsInt32());
+        return true;  // absence of property is signaled by empty handle.
+      }
+    }
   } else if (!interceptor->getter()->IsUndefined()) {
     v8::IndexedPropertyGetter getter =
         v8::ToCData<v8::IndexedPropertyGetter>(interceptor->getter());