Added a ForceYouTubeRestrict policy and deprecated the old ForceYouTubeSafetyMode policy

chrome/browser/net/safe_search_util.h

 // Copyright 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 {
 
+// Values for YouTube Restricted Mode.
+// VALUES MUST COINCIDE WITH ForceYouTubeRestrict POLICY.
+enum class YouTubeRestrictMode {
+  kOff = 0,      // Do not restrict YouTube content. YouTube might still

[Thiemo Nagel, 2016/10/05 17:38:14]

Sadly the Chromium style guide requires SHOUTY_CASE, overruling the Google style
guide in that regard.

https://chromium.googlesource.com/chromium/src/+/master/styleguide/c++/c++.md

[ljusten (tachyonic), 2016/10/06 10:14:45]

Sigh... I cannot simply rename kStrict to STRICT because some Windows code
#defines STRICT. I decided to go back to a plain enum and name the values
YOUTUBE_RESTRICT_*. That's clear, compiles, complies with naming conventions and
saves some typecasts to int.

+                 // restrict content based on its user settings.
+  kModerate = 1, // Enforce at least a moderately strict content filter for
+                 // YouTube.
+  kStrict = 2    // Enforce a strict content filter for YouTube.
+};
+
 // 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
-// setting YouTube's Safety Mode header.
-void ForceYouTubeSafetyMode(const net::URLRequest* request,
-                            net::HttpRequestHeaders* headers);
+// Does nothing if |request| is not a request to YouTube. Otherwise, if |mode|
+// is not |YouTubeRestrictMode::kOff|, enforces a minimum YouTube Restrict mode
+// by setting YouTube Restrict header. Setting |YouTubeRestrictMode::kOff|
+// removes a Restrict header if it exists.
+void ForceYouTubeRestrict(const net::URLRequest* request,
+                          net::HttpRequestHeaders* headers,
+                          YouTubeRestrictMode mode);
 
 int GetForceGoogleSafeSearchCountForTesting();
-int GetForceYouTubeSafetyModeCountForTesting();
+int GetForceYouTubeRestrictCountForTesting();
 void ClearForceGoogleSafeSearchCountForTesting();
-void ClearForceYouTubeSafetyModeCountForTesting();
+void ClearForceYouTubeRestrictCountForTesting();
 
 }  // namespace safe_search_util
 
 #endif  // CHROME_BROWSER_NET_SAFE_SEARCH_UTIL_H_