Update to Chromium version 138.0.7204.0 (#1465706)

Mac: Require Xcode 16.3 (16E140) and SDK 15.4 (24E241)

libcef/browser/test/test_helpers_impl.cc

@@ -3,7 +3,6 @@
 // can be found in the LICENSE file.
 
 #include "base/feature_list.h"
-#include "base/features.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "cef/include/test/cef_test_helpers.h"
@@ -20,7 +19,6 @@ bool CefIsFeatureEnabledForTests(const CefString& feature_name) {
   // Only includes values that are queried by unit tests.
   const base::Feature* features[] = {
       &net::features::kIgnoreHSTSForLocalhost,
-      &base::features::kUseRustJsonParser,
       &network::features::kReduceAcceptLanguage,
   };