Privacy Sandbox Settings: Add release 4 entry in chrome://flags

Bug: 1378703
Change-Id: I701dd1d8aa5d50a99f6001211eac9814164b2562
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4132825
Reviewed-by: Mariam Ali <[email protected]>
Commit-Queue: Theodore Olsauskas-Warren <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1088643}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index f70f5fc..861edbae 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2452,6 +2452,10 @@
     "Fenced Frames, Shared Storage, Private Aggregation, and their associated "
     "features.";
 
+const char kPrivacySandboxSettings4Name[] = "Privacy Sandbox Settings V4";
+const char kPrivacySandboxSettings4Description[] =
+    "Enables updated Privacy Sandbox UI";
+
 const char kPrivateAggregationDeveloperModeName[] =
     "Private Aggregation developer mode";
 const char kPrivateAggregationDeveloperModeDescription[] =