Add login.live.com exception for HTTP Accept-Language farbling (uplif…

…t to 1.53.x) (#19023)

Uplift of #18987 (squashed) to release

browser/farbling/brave_navigator_languages_farbling_browsertest.cc

@@ -258,6 +258,7 @@ IN_PROC_BROWSER_TEST_F(BraveNavigatorLanguagesFarblingBrowserTest,
   std::string domain_d = "d.test";
   std::string domain_x = "www.ulta.com";
   std::string domain_y = "aeroplan.rewardops.com";
+  std::string domain_z = "login.live.com";
   GURL url_b = https_server_.GetURL(
       domain_b, "/reduce-language/page-with-subresources.html");
   GURL url_d = https_server_.GetURL(
@@ -266,6 +267,8 @@ IN_PROC_BROWSER_TEST_F(BraveNavigatorLanguagesFarblingBrowserTest,
       domain_x, "/reduce-language/page-with-subresources.html");
   GURL url_y = https_server_.GetURL(
       domain_y, "/reduce-language/page-with-subresources.html");
+  GURL url_z = https_server_.GetURL(
+      domain_z, "/reduce-language/page-with-subresources.html");
   SetAcceptLanguages("la,es,en");
 
   // Farbling level: off
@@ -328,4 +331,6 @@ IN_PROC_BROWSER_TEST_F(BraveNavigatorLanguagesFarblingBrowserTest,
   ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), url_x));
   BlockFingerprinting(domain_y);
   ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), url_y));
+  BlockFingerprinting(domain_z);
+  ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), url_z));
 }

browser/net/brave_reduce_language_network_delegate_helper.cc

@@ -36,7 +36,9 @@ static constexpr auto kFarbleAcceptLanguageExceptions =
         {// https://github.com/brave/brave-browser/issues/25309
          "ulta.com", "www.ulta.com",
          // https://github.com/brave/brave-browser/issues/26325
-         "aeroplan.rewardops.com"});
+         "aeroplan.rewardops.com",
+         // https://github.com/brave/brave-browser/issues/31196
+         "login.live.com"});
 }  // namespace
 
 std::string FarbleAcceptLanguageHeader(