X-Chrome-Connected is stripped when it should not be in headers.

chrome/browser/signin/chrome_signin_helper.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_SIGNIN_CHROME_SIGNIN_HELPER_H_
 #define CHROME_BROWSER_SIGNIN_CHROME_SIGNIN_HELPER_H_
 
 #include <string>
 
 namespace net {
 class URLRequest;
 }
 class GURL;
 class ProfileIOData;
 
 // Utility functions for handling Chrome/Gaia headers during signin process.
 // In the Mirror world, Chrome identity should always stay in sync with Gaia
 // identity. Therefore Chrome needs to send Gaia special header for requests
 // from a connected profile, so that Gaia can modify its response accordingly
 // and let Chrome handles signin with native UI.
 namespace signin {
 
 // Adds X-Chrome-Connected header to all Gaia requests from a connected profile,
 // with the exception of requests from gaia webview. Must be called on IO
 // thread.
 // Returns true if the account management header was added to the request.
-bool AppendMirrorRequestHeaderHelper(net::URLRequest* request,
-                                     const GURL& redirect_url,
-                                     ProfileIOData* io_data,
-                                     int child_id,
-                                     int route_id);
+// Removes X-Chrome-Connected header if it is already in the headers and
+// it should not be there.
+void FixMirrorRequestHeaderHelper(net::URLRequest* request,
+                                  const GURL& redirect_url,
+                                  ProfileIOData* io_data,
+                                  int child_id,
+                                  int route_id);
 
 // Looks for the X-Chrome-Manage-Accounts response header, and if found,
 // tries to show the avatar bubble in the browser identified by the
 // child/route id. Must be called on IO thread.
 void ProcessMirrorResponseHeaderIfExists(net::URLRequest* request,
                                          ProfileIOData* io_data,
                                          int child_id,
                                          int route_id);
 
 };  // namespace signin
 
 #endif  // CHROME_BROWSER_SIGNIN_CHROME_SIGNIN_HELPER_H_