Append the safe search parameter to the safe search settings page

When accessing the safe searching setting page google.com/safesearch,
automatically append the parameter if safe searching is forced by policy
so that the page will also be disabled.

Bug: 1485831
Change-Id: I782e1729f40e57c7fe725edce6828cbe17f34b10
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4969035
Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1214233}

components/safe_search_api/safe_search_util.cc

@@ -55,6 +55,16 @@ std::string AddSafeSearchParameters(const std::string& query) {
   return base::JoinString(new_parameters, "&");
 }
 
+bool IsSafeSearchSettingUrl(const GURL& url) {
+  if (!google_util::IsGoogleDomainUrl(
+          url, google_util::ALLOW_SUBDOMAIN,
+          google_util::DISALLOW_NON_STANDARD_PORTS)) {
+    return false;
+  }
+
+  return url.path_piece() == "/safesearch";
+}
+
 }  // namespace
 
 namespace safe_search_api {
@@ -71,7 +81,7 @@ const char kGoogleAppsAllowedDomains[] = "X-GoogApps-Allowed-Domains";
 // Sets the query part of |new_url| with the new value of the parameters.
 void ForceGoogleSafeSearch(const GURL& url, GURL* new_url) {
   if (!google_util::IsGoogleSearchUrl(url) &&
-      !google_util::IsGoogleHomePageUrl(url)) {
+      !google_util::IsGoogleHomePageUrl(url) && !IsSafeSearchSettingUrl(url)) {
     return;
   }
 

components/safe_search_api/safe_search_util_unittest.cc

@@ -123,6 +123,18 @@ TEST(SafeSearchUtilTest, AddGoogleSafeSearchParams) {
                        "imgurl=https://image&" + kBothParameters);
 }
 
+TEST(SafeSearchUtilTest, SafeSearchSettingsPage) {
+  const std::string kBothParameters =
+      std::string(safe_search_api::kSafeSearchSafeParameter) + "&" +
+      safe_search_api::kSafeSearchSsuiParameter;
+
+  CheckAddedParameters("https://www.google.com/safesearch", kBothParameters);
+  CheckAddedParameters("https://google.ca/safesearch", kBothParameters);
+  CheckAddedParameters("https://ipv4.google.com/safesearch", kBothParameters);
+  CheckAddedParameters("https://ipv4.google.com/safesearch?safe=off",
+                       kBothParameters);
+}
+
 TEST(SafeSearchUtilTest, SetYoutubeHeader) {
   net::HttpRequestHeaders headers;
   safe_search_api::ForceYouTubeRestrict(