Put inherited readonliness behind a flag,

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 e151d3d373c34fb7de7f3c94e83b219df66404f6..218e8300b3d9f5b486f412257945399cd50aa939 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -12151,6 +12151,7 @@ TEST(RegExpStringModification) {
 // Test that we cannot set a property on the global object if there
 // is a read-only property in the prototype chain.
 TEST(ReadOnlyPropertyInGlobalProto) {
+  i::FLAG_es5_readonly = true;
   v8::HandleScope scope;
   v8::Handle<v8::ObjectTemplate> templ = v8::ObjectTemplate::New();
   LocalContext context(0, templ);