[DanglingPtr] Default enable_dangling_raw_ptr_feature_flag on Linux (#26318)

[DanglingPtr] Default `enable_dangling_raw_ptr_feature_flag`

This flag should not be set to `true` but rather defaulted on Linux, as
we don't want the flag being swtiched on for Release builds, which don't
support it.

build/commands/lib/config.js

@@ -425,13 +425,21 @@ Config.prototype.buildArgs = function () {
     brave_services_production_domain: this.braveServicesProductionDomain,
     brave_services_staging_domain: this.braveServicesStagingDomain,
     brave_services_dev_domain: this.braveServicesDevDomain,
-    enable_dangling_raw_ptr_feature_flag: (this.getTargetOS() === 'linux'),
     brave_services_key_id: this.brave_services_key_id,
     service_key_aichat: this.service_key_aichat,
     service_key_stt: this.service_key_stt,
     generate_about_credits: true,
   }
 
+
+  if (this.getTargetOS() !== 'linux') {
+    // We explicitly disabled the check for certain other OSes, while leaving
+    // it as whatever is the default on the ones we've managed to get the
+    // detector properly running.
+    args.enable_dangling_raw_ptr_feature_flag = false
+  }
+
+
   if (!this.isBraveReleaseBuild()) {
     args.chrome_pgo_phase = 0