Have Chrome Frame "support" IE conditional comment tags (of the downlevel-hid...

chrome_frame/html_utils.h

Index: chrome_frame/html_utils.h
===================================================================
--- chrome_frame/html_utils.h	(revision 68996)
+++ chrome_frame/html_utils.h	(working copy)
@@ -107,8 +107,15 @@
   // string described by html_string, false otherwise.
   // For example with html_string describing <!-- foo> -->, pos must refer to
   // the last > for this method to return true.
-  bool IsHTMLCommentClose(StringRange* html_string, StrPos pos);
+  bool IsHTMLCommentClose(const StringRange* html_string, StrPos pos);
 
+  // Returns true if pos refers to the last character in the terminator of the
+  // opening tag of a downlevel-hidden conditional comment in IE as per
+  // http://msdn.microsoft.com/en-us/library/ms537512(VS.85).aspx#syntax
+  // For example with html_string describing <![if booga >wooga]>, pos must
+  // refer to the last > for this method to return true.
+  bool IsIEConditionalCommentClose(const StringRange* html_string, StrPos pos);
+
   // We store a (CollapsedWhitespace'd) copy of the html data.
   const std::wstring html_string_;