Deal with frame removal by content scripts

third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011, 2014 Apple 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
@@ skipping 170 matching lines @@
     String takeLeadingWhitespace()
     {
         return takeLeading<isHTMLSpace<UChar>>();
     }
 
     void skipLeadingNonWhitespace()
     {
         skipLeading<isNotHTMLSpace<UChar>>();
     }
 
+    void skipRemaining()
+    {
+        m_current = m_end;
+    }
+
     String takeRemaining()
     {
         ASSERT(!isEmpty());
         unsigned start = m_current;
         m_current = m_end;
         // Notice that substring is smart enough to return *this when start == 0.
         return String(m_characters->substring(start, m_end - start));
     }
 
     void giveRemainingTo(StringBuilder& recipient)
@@ skipping 2080 matching lines @@
             return;
         defaultForInitial();
         // Fall through.
     }
     case BeforeHTMLMode: {
         ASSERT(getInsertionMode() == BeforeHTMLMode);
         buffer.skipLeadingWhitespace();
         if (buffer.isEmpty())
             return;
         defaultForBeforeHTML();
+        if (m_parser->isStopped()) {
+            buffer.skipRemaining();
+            return;
+        }
         // Fall through.
     }
     case BeforeHeadMode: {
         ASSERT(getInsertionMode() == BeforeHeadMode);
         buffer.skipLeadingWhitespace();
         if (buffer.isEmpty())
             return;
         defaultForBeforeHead();
         // Fall through.
     }
@@ skipping 511 matching lines @@
     ASSERT(m_isAttached);
     // Warning, this may detach the parser. Do not do anything else after this.
     m_tree.finishedParsing();
 }
 
 void HTMLTreeBuilder::parseError(AtomicHTMLToken*)
 {
 }
 
 } // namespace blink