[serializer] include global proxy in additional context snapshots.

src/contexts.cc

 // Copyright 2011 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/contexts.h"
 
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
 
@@ skipping 564 matching lines @@
   // contexts. This is necessary to fix circular dependencies.
   if (child->GetIsolate()->bootstrapper()->IsActive()) return true;
   if (!object->IsContext()) return false;
   Context* context = Context::cast(object);
   return context->IsNativeContext() || context->IsScriptContext() ||
          context->IsModuleContext() || !child->IsModuleContext();
 }
 
 #endif
 
+void Context::ResetErrorsThrown() {
+  DCHECK(IsNativeContext());
+  set_errors_thrown(Smi::FromInt(0));
+}
 
 void Context::IncrementErrorsThrown() {
   DCHECK(IsNativeContext());
 
   int previous_value = errors_thrown()->value();
   set_errors_thrown(Smi::FromInt(previous_value + 1));
 }
 
 
 int Context::GetErrorsThrown() { return errors_thrown()->value(); }
 
 }  // namespace internal
 }  // namespace v8