Add "own" symbols support.

src/lookup.h

Index: src/lookup.h
diff --git a/src/lookup.h b/src/lookup.h
index 923e8107fd3a36c159b4396b458de7962baca666..2d609c5f666c6b77851cf3917f000e18e8d5b6e0 100644
--- a/src/lookup.h
+++ b/src/lookup.h
@@ -47,7 +47,7 @@ class LookupIterator V8_FINAL BASE_EMBEDDED {
   LookupIterator(Handle<Object> receiver,
                  Handle<Name> name,
                  Configuration configuration = CHECK_ALL)
-      : configuration_(configuration),
+      : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
@@ -66,7 +66,7 @@ class LookupIterator V8_FINAL BASE_EMBEDDED {
                  Handle<Name> name,
                  Handle<JSReceiver> holder,
                  Configuration configuration = CHECK_ALL)
-      : configuration_(configuration),
+      : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
@@ -187,6 +187,15 @@ class LookupIterator V8_FINAL BASE_EMBEDDED {
     return number_;
   }
 
+  static Configuration ComputeConfiguration(
+      Configuration configuration, Handle<Name> name) {
+    if (name->IsOwn()) {
+      return static_cast<Configuration>(configuration & CHECK_OWN);
+    } else {
+      return configuration;
+    }
+  }
+
   Configuration configuration_;
   State state_;
   bool has_property_;