Add a setting to CF to remove 'chromeframe' from the UserAgent on a per-pattern basis.

chrome_frame/html_utils.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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>
 #include <vector>
@@ skipping 108 matching lines @@
   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 {
 
-// Adds "chromeframe/x.y" to the end of the User-Agent string (x.y is the
-// version).  If the cf tag has already been added to the string,
-// the original string is returned.
+// Adds "chromeframe/a.b.c.d" to the User-Agent string (a.b.c.d is the version).
+// If the cf tag has already been added to the string, the original string is
+// returned.
 std::string AddChromeFrameToUserAgentValue(const std::string& value);
 
+// Removes "chromeframe/a.b.c.d" from the User-Agent string (a.b.c.d is the
+// version).  If the cf tag is not present in the string, the original string is
+// returned.
+std::string RemoveChromeFrameFromUserAgentValue(const std::string& value);
+
 // Fetches the user agent from urlmon and adds chrome frame to the
 // comment section.
 // NOTE: The returned string includes the "User-Agent: " header name.
 std::string GetDefaultUserAgentHeaderWithCFTag();
 
 // Returns the User-Agent header as would be used by Chrome itself.
 const char* GetChromeUserAgent();
 
 // Fetches the default user agent string from urlmon.
 // This value does not include the "User-Agent:" header name.
 std::string GetDefaultUserAgent();
 
 // Returns the Chrome Frame user agent.  E.g. "chromeframe/1.0".
 // Note that in unit tests this will be "chromeframe/0.0" due to the version
 // table not being present in the unit test executable.
 const char* GetChromeFrameUserAgent();
 
 // Returns true if there is a frame busting header (other than the do-nothing
 // "X-Frame-Options: ALLOWALL") in the provided header block.  Note that there
 // 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_