Make sure that HttpRequestHeaders contains valid key-value pairs.

chrome/browser/extensions/api/web_request/web_request_api_helpers.h

 // 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.
 
 // Helper classes and functions used for the WebRequest API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_HELPERS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_HELPERS_H_
 
 #include <list>
@@ skipping 308 matching lines @@
 // Triggers clearing each renderer's in-memory cache the next time it navigates.
 void ClearCacheOnNavigation();
 
 // Tells renderer processes that the web request or declarative web request
 // API has been used by |extension| in profile |profile_id| to collect
 // UMA statistics on Page Load Times. Needs to be called on the UI thread.
 void NotifyWebRequestAPIUsed(
     void* profile_id,
     scoped_refptr<const extensions::Extension> extension);
 
-// Whether a header is RFC 2616-compliant.
-bool IsValidHeaderName(const std::string& name);
-// Whether a header value does not contain NUL or CRLF.
-bool IsValidHeaderValue(const std::string& value);
-
 }  // namespace extension_web_request_api_helpers
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_HELPERS_H_