Clear PendingScript::m_streamer when it is cancelled

third_party/WebKit/Source/core/dom/PendingScript.cpp

 /*
  * Copyright (C) 2010 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 205 matching lines @@
     return m_streamer->resource()->errorOccurred();
   return false;
 }
 
 void PendingScript::onMemoryStateChange(MemoryState state) {
   if (state != MemoryState::SUSPENDED)
     return;
   if (!m_streamer)
     return;
   m_streamer->cancel();
+  m_streamer = nullptr;
 }
 
 }  // namespace blink