(early draft) Strict mode - throw exception on assignment to read only property.

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 0da3f1cdc76fb9c44047ec8557544e20f9a15b94..a0180a69dd98e4c320046b5b406712929459547e 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -10044,7 +10044,8 @@ class RegExpStringModificationTest {
         i::Factory::NewStringFromAscii(i::Vector<const char>("input", 5));
     i::Top::global_context()->global()->SetProperty(*input_name,
                                                     *input_,
-                                                    NONE)->ToObjectChecked();
+                                                    NONE,
+                                                    i::kNonStrictMode)->ToObjectChecked();
 
 
     MorphThread morph_thread(this);