Disable indexing features to allow BravePrefProvider work as intended.

Upstream change:
https://chromium.googlesource.com/chromium/src/+/cdb4efcd0b060341a2864a63d6104d91082e8064

commit cdb4efcd0b060341a2864a63d6104d91082e8064
Author: Patricia Alfonso <trishalfonso@google.com>
Date:   Thu Apr 11 22:38:05 2024 +0000

    [optimize-content-settings] Enable indexed content settings by default

    Bug: 316530672
    Change-Id: I33b4852e9d2ba1bcade6b1e6c809a6c6a9d67236
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5435975
    Reviewed-by: Christian Dullweber <dullweber@chromium.org>
    Reviewed-by: Filipa Senra <fsenra@google.com>
    Commit-Queue: Patricia Alfonso <trishalfonso@google.com>
    Cr-Commit-Position: refs/heads/main@{#1286152}

chromium_src/components/content_settings/core/common/features.cc

@@ -13,6 +13,12 @@ namespace features {
 OVERRIDE_FEATURE_DEFAULT_STATES({{
     {kTrackingProtection3pcd, base::FEATURE_DISABLED_BY_DEFAULT},
     {kUserBypassUI, base::FEATURE_DISABLED_BY_DEFAULT},
+
+    // Disable content settings indexing as it's currently doesn't work well
+    // with our BravePrefProvider.
+    // TODO(https://github.com/brave/brave-browser/issues/37877).
+    {kHostIndexedMetadataGrants, base::FEATURE_DISABLED_BY_DEFAULT},
+    {kIndexedHostContentSettingsMap, base::FEATURE_DISABLED_BY_DEFAULT},
 }});
 
 }  // namespace features