[strong] Implement per-object restrictions behaviour of delete operator

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 21090 matching lines @@
 
   {
     v8::TryCatch try_catch;
     v8::Handle<Value> args[] = {v8_num(42), v8_num(555)};
     fun->Call(v8::Undefined(isolate), arraysize(args), args);
     CHECK(!try_catch.HasCaught());
   }
 }
 
 
+TEST(StrongModeObjectDelete) {

[rossberg, 2015/05/22 11:34:50]

Nit: StrongObjectDelete (especially since the delete happens outside the mode)

[conradw, 2015/05/22 13:37:56]

Done.

+  i::FLAG_strong_mode = true;
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  v8::HandleScope scope(isolate);
+  Local<Object> obj;
+  {
+    v8::TryCatch try_catch;
+    obj = Local<Object>::Cast(CompileRun(
+        "function f(x) { 'use strong'; }"
+        "f"));
+
+    CHECK(!try_catch.HasCaught());
+  }
+  obj->ForceSet(v8_str("foo"), v8_num(1), v8::None);
+  obj->ForceSet(v8_num(2), v8_num(1), v8::None);
+  CHECK(!obj->Delete(v8_str("foo")));
+  CHECK(!obj->Delete(2));
+}
+
+
 TEST(ExtrasExportsObject) {
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope handle_scope(isolate);
   LocalContext env;
 
   // standalone.gypi ensures we include the test-extra.js file, which should
   // add the testExtraShouldReturnFive export
   v8::Local<v8::Object> exports = env->GetExtrasExportsObject();
 
   auto func =
       exports->Get(v8_str("testExtraShouldReturnFive")).As<v8::Function>();
   auto undefined = v8::Undefined(isolate);
   auto result = func->Call(undefined, 0, {}).As<v8::Number>();
 
   CHECK(result->Value() == 5.0);
 }