Make CallSite constructor inaccessible from JS

src/execution.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/execution.h"
 
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/isolate-inl.h"
 #include "src/messages.h"
@@ skipping 413 matching lines @@
 
 
 // --- C a l l s   t o   n a t i v e s ---
 
 
 Handle<String> Execution::GetStackTraceLine(Handle<Object> recv,
                                             Handle<JSFunction> fun,
                                             Handle<Object> pos,
                                             Handle<Object> is_global) {
   Isolate* isolate = fun->GetIsolate();
-
-  Handle<JSFunction> ctor =
-      handle(isolate->native_context()->callsite_function(), isolate);
   Handle<Object> strict_mode = isolate->factory()->ToBoolean(false);
 
-  MaybeHandle<Object> maybe_callsite = CallSiteUtils::Construct(
-      isolate, ctor, ctor, recv, fun, pos, strict_mode);
+  MaybeHandle<Object> maybe_callsite =
+      CallSiteUtils::Construct(isolate, recv, fun, pos, strict_mode);
   if (maybe_callsite.is_null()) {
     isolate->clear_pending_exception();
     return isolate->factory()->empty_string();
   }
 
   MaybeHandle<String> maybe_to_string =
       CallSiteUtils::ToString(isolate, maybe_callsite.ToHandleChecked());
   if (maybe_to_string.is_null()) {
     isolate->clear_pending_exception();
     return isolate->factory()->empty_string();
@@ skipping 44 matching lines @@
 
   isolate_->counters()->stack_interrupts()->Increment();
   isolate_->counters()->runtime_profiler_ticks()->Increment();
   isolate_->runtime_profiler()->MarkCandidatesForOptimization();
 
   return isolate_->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8