Enforce SafetyMode for YouTube if prefs::kForceSafeSearch is on.

chrome/browser/net/safe_search_util.h

+// Copyright (c) 2014 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_NET_SAFE_SEARCH_UTIL_H_
+#define CHROME_BROWSER_NET_SAFE_SEARCH_UTIL_H_
+
+class GURL;
+
+namespace net {
+class HttpRequestHeaders;
+class URLRequest;
+}
+
+namespace safe_search_util {
+
+// If |request| is a request to Google Web Search, enforces that the SafeSearch
+// query parameters are set to active. Sets |new_url| to a copy of the request
+// url in which the query part contains the new values of the parameters.
+void ForceGoogleSafeSearch(const net::URLRequest* request, GURL* new_url);
+
+// If |request| is a request to YouTube, enforces YouTube's Safety Mode by
+// adding/modifying YouTube's PrefCookie header.
+void ForceYouTubeSafetyMode(const net::URLRequest* request,
+                            net::HttpRequestHeaders* headers);
+
+}  // namespace safe_search_util
+
+#endif  // CHROME_BROWSER_NET_SAFE_SEARCH_UTIL_H_