Serializer: assert that we deserialize only one native context.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 877 matching lines @@
                                  Handle<FixedArray> outdated_contexts) {
   Handle<GlobalObject> global_object_from_snapshot(
       GlobalObject::cast(native_context()->extension()));
   Handle<JSBuiltinsObject> builtins_global(native_context()->builtins());
   native_context()->set_extension(*global_object);
   native_context()->set_security_token(*global_object);
 
   // Replace outdated global objects in deserialized contexts.
   for (int i = 0; i < outdated_contexts->length(); ++i) {
     Context* context = Context::cast(outdated_contexts->get(i));
+    // Assert that there is only one native context.
+    DCHECK(!context->IsNativeContext() || context == *native_context());
     DCHECK_EQ(context->global_object(), *global_object_from_snapshot);
     context->set_global_object(*global_object);
   }
 
   static const PropertyAttributes attributes =
       static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
   Runtime::DefineObjectProperty(builtins_global, factory()->global_string(),
                                 global_object, attributes).Assert();
   // Set up the reference from the global object to the builtins object.
   JSGlobalObject::cast(*global_object)->set_builtins(*builtins_global);
@@ skipping 2052 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal