Make Date and RegExp inherit from Object in the API.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 8548b441e990d03ccf85cb79518e57d922791bb5..e2a7fb1856c7c97398fa8e932652fbd275b295bf 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -1050,8 +1050,10 @@ THREADED_TEST(Date) {
   v8::HandleScope scope;
   LocalContext env;
   double PI = 3.1415926;
-  Local<Value> date_obj = v8::Date::New(PI);
-  CHECK_EQ(3.0, date_obj->NumberValue());
+  Local<Value> date = v8::Date::New(PI);
+  CHECK_EQ(3.0, date->NumberValue());
+  date.As<v8::Date>()->Set(v8_str("property"), v8::Integer::New(42));
+  CHECK_EQ(42, date.As<v8::Date>()->Get(v8_str("property"))->Int32Value());
 }
 
 
@@ -13740,6 +13742,11 @@ TEST(RegExp) {
   context->Global()->Set(v8_str("re"), re);
   ExpectTrue("re.test('FoobarbaZ')");
 
+  // RegExps are objects on which you can set properties.
+  re->Set(v8_str("property"), v8::Integer::New(32));
+  v8::Handle<v8::Value> value = CompileRun("re.property");
+  ASSERT_EQ(32, value->Int32Value());
+
   v8::TryCatch try_catch;
   re = v8::RegExp::New(v8_str("foo["), v8::RegExp::kNone);
   CHECK(re.IsEmpty());