Investigate when info.Holder()->CreationContext is different from current context

third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.h

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 97 matching lines @@
         // creationContext should not be empty. Because if we have an
         // empty creationContext, we will end up creating
         // a new object in the context currently entered. This is wrong.
         RELEASE_ASSERT(!creationContext.IsEmpty());
         v8::Local<v8::Context> contextForWrapper = creationContext->CreationContext();
 
         // For performance, we enter the context only if the currently running context
         // is different from the context that we are about to enter.
         if (contextForWrapper == m_context)
             return;
+        RELEASE_ASSERT(creationContext->CreationContext()->Global() == m_context->Global());
         if (withSecurityCheck) {
             securityCheck(isolate, contextForWrapper);
         } else {
             m_convertExceptions = true;
         }
         m_context = v8::Local<v8::Context>::New(isolate, contextForWrapper);
         m_didEnterContext = true;
         m_context->Enter();
     }
 
@@ skipping 22 matching lines @@
 
     bool m_didEnterContext;
     v8::Local<v8::Context> m_context;
     v8::TryCatch m_tryCatch;
     bool m_convertExceptions;
 };
 
 } // namespace blink
 
 #endif // V8DOMWrapper_h