Abandon Prerender upon finalizing PrerenderHandle.

third_party/WebKit/Source/core/loader/PrerenderHandle.cpp

 /*
  * Copyright (C) 2013 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 48 matching lines @@
 }
 
 PrerenderHandle::PrerenderHandle(Document& document, Prerender* prerender)
     : DocumentLifecycleObserver(&document)
     , m_prerender(prerender)
 {
 }
 
 PrerenderHandle::~PrerenderHandle()
 {
-    if (m_prerender)
+    if (m_prerender) {
+        m_prerender->abandon();
         detach();
+    }
 }
 
 void PrerenderHandle::cancel()
 {
     // Avoid both abandoning and canceling the same prerender. In the abandon case, the LinkLoader cancels the
     // PrerenderHandle as the Document is destroyed, even through the DocumentLifecycleObserver has already abandoned
     // it.
     if (!m_prerender)
         return;
     m_prerender->cancel();
@@ skipping 24 matching lines @@
     m_prerender.clear();
 }
 
 DEFINE_TRACE(PrerenderHandle)
 {
     visitor->trace(m_prerender);
     DocumentLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink