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

chrome_frame/html_utils.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file defines utility functions for working with html.
 
 #ifndef CHROME_FRAME_HTML_UTILS_H_
 #define CHROME_FRAME_HTML_UTILS_H_
 
 #include <string>
@@ skipping 91 matching lines @@
 
   // Returns true if c can be found in quotes_, false otherwise
   bool IsQuote(wchar_t c);
 
   // Returns true if pos refers to the last character in an HTML comment in a
   // 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);
 
+  // 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(StringRange* html_string, StrPos pos);
+
   // We store a (CollapsedWhitespace'd) copy of the html data.
   const std::wstring html_string_;
 
   // Store the string of quote characters to avoid repeated construction.
   const std::wstring quotes_;
 
   DISALLOW_COPY_AND_ASSIGN(HTMLScanner);
 };
 
 namespace http_utils {
@@ skipping 25 matching lines @@
 // may be multiple X-Frame-Options values specified; if there is one anywhere in
 // the list with a value other than ALLOWALL, this returns true.
 bool HasFrameBustingHeader(const std::string& http_headers);
 
 // Returns the header passed in from the headers list.
 std::string GetHttpHeaderFromHeaderList(const std::string& header_name,
                                         const std::string& headers);
 }  // namespace http_utils
 
 #endif  // CHROME_FRAME_HTML_UTILS_H_