Add a feature for not compositing small scrollers

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 1f5cc79118efa616a1dfed1cf2af58104eaf2fff..9974c77428bd0a3123b21a535ed393509a777a4a 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -349,6 +349,9 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
     WebRuntimeFeatures::EnableFeatureFromString("CompositeOpaqueScrollers",
                                                 false);
 
+  if (base::FeatureList::IsEnabled(features::kNotCompositeSmallScroller))
+    WebRuntimeFeatures::EnableNotCompositeSmallScroller(true);
+
   if (base::FeatureList::IsEnabled(features::kGenericSensor))
     WebRuntimeFeatures::EnableGenericSensor(true);