[Privacy Sandbox] Add privacy sandbox prefs

Add privacy sandbox prefs not gated on the PrivacySandboxSettings
feature to enable smooth extension integration for pref.

Bug: 1152336
Change-Id: I8176208d7159a8330271162b15790e8b40177aa4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2562668
Reviewed-by: Vasilii Sukhanov <[email protected]>
Reviewed-by: Martin Šrámek <[email protected]>
Commit-Queue: Sean Harrison <[email protected]>
Cr-Commit-Position: refs/heads/master@{#831584}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index fd694ae..33ab250 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -59,6 +59,7 @@
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/previews/previews_https_notification_infobar_decider.h"
 #include "chrome/browser/printing/print_preview_sticky_settings.h"
+#include "chrome/browser/privacy_sandbox/privacy_sandbox_prefs.h"
 #include "chrome/browser/profiles/chrome_version_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_attributes_entry.h"
@@ -827,6 +828,7 @@
   PrefetchProxyOriginDecider::RegisterPrefs(registry);
   PrefsTabHelper::RegisterProfilePrefs(registry, locale);
   PreviewsHTTPSNotificationInfoBarDecider::RegisterProfilePrefs(registry);
+  privacy_sandbox::RegisterProfilePrefs(registry);
   Profile::RegisterProfilePrefs(registry);
   ProfileImpl::RegisterProfilePrefs(registry);
   ProfileNetworkContextService::RegisterProfilePrefs(registry);