Implement feature policy checks in the browser process

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 3588134f311840dc0fbe564ed02aa1ffd5ebc6e5..3b2ec58d49c254852e83a133b158afa331565289 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -254,6 +254,11 @@ const base::Feature kTopDocumentIsolation{"top-document-isolation",
 const base::Feature kTouchpadAndWheelScrollLatching{
     "TouchpadAndWheelScrollLatching", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Use Feature Policy to gate the use of permission features like midi,
+// geolocation, camera, microphone, etc.
+const base::Feature kUseFeaturePolicyForPermissions{
+    "UseFeaturePolicyForPermissions", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Controls whether vibrate requires user gesture.
 const base::Feature kVibrateRequiresUserGesture{
     "VibrateRequiresUserGesture", base::FEATURE_ENABLED_BY_DEFAULT};