HTMLConstructionSite: avoid n^2 running time for large scripts.

Source/core/html/parser/HTMLTreeBuilder.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 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 65 matching lines @@
     void constructTree(AtomicHTMLToken*);
 
     bool hasParserBlockingScript() const { return !!m_scriptToProcess; }
     // Must be called to take the parser-blocking script before calling the parser again.
     PassRefPtrWillBeRawPtr<Element> takeScriptToProcess(TextPosition& scriptStartPosition);
 
     // Done, close any open tags, etc.
     void finished();
 
     // Synchronously empty any queues, possibly creating more DOM nodes.
-    void flush() { m_tree.flush(); }
+    void flush() { m_tree.flush(FlushIfAtTextLimit); }

[eseidel, 2014/08/29 08:53:09]

What does this mean now that it doesn't always "flush"?

What does it mean now to flush the treebuilder?

I'm having some difficulty (at least at 2am) paging this code back into my
brain.  The comment above this looks wrong now though.

[eustas, 2014/09/01 09:46:44]

Fixed comment. Pulled "mode" up to actual call-site.

 
     void setShouldSkipLeadingNewline(bool shouldSkip) { m_shouldSkipLeadingNewline = shouldSkip; }
 
 private:
     class CharacterTokenBuffer;
     // Represents HTML5 "insertion mode"
     // http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#insertion-mode
     enum InsertionMode {
         InitialMode,
         BeforeHTMLMode,
@@ skipping 142 matching lines @@
 
     RefPtrWillBeMember<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
     TextPosition m_scriptToProcessStartPosition; // Starting line number of the script tag needing processing.
 
     HTMLParserOptions m_options;
 };
 
 }
 
 #endif