[runtime] Replace global object link with native context link in all contexts.

src/snapshot/serialize.cc

 // Copyright 2012 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/snapshot/serialize.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 1835 matching lines @@
   // Clear literal boilerplates.
   if (obj->IsJSFunction() && !JSFunction::cast(obj)->shared()->bound()) {
     FixedArray* literals = JSFunction::cast(obj)->literals();
     for (int i = 0; i < literals->length(); i++) literals->set_undefined(i);
   }
 
   // Object has not yet been serialized.  Serialize it here.
   ObjectSerializer serializer(this, obj, sink_, how_to_code, where_to_point);
   serializer.Serialize();
 
+  // TODO(yangguo): We probably only need ScriptContext here for post-
+  // processing in Genesis::HookUpGlobalThisBinding.
   if (obj->IsContext() &&
       Context::cast(obj)->global_object() == global_object_) {
     // Context refers to the current global object. This reference will
     // become outdated after deserialization.
     outdated_contexts_.Add(Context::cast(obj));
   }
 }
 
 
 void Serializer::ObjectSerializer::SerializePrologue(AllocationSpace space,
@@ skipping 990 matching lines @@
   SerializedCodeData* scd = new SerializedCodeData(cached_data);
   SanityCheckResult r = scd->SanityCheck(isolate, source);
   if (r == CHECK_SUCCESS) return scd;
   cached_data->Reject();
   source->GetIsolate()->counters()->code_cache_reject_reason()->AddSample(r);
   delete scd;
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8