Add runtime feature SlimmingPaintInvalidation

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 b610c6da7d7561eb2aa89bda42dc5e9343839e74..d8f97951c4003c4c7325f19a55e24740435b37e7 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -206,6 +206,10 @@ const base::Feature kServiceWorkerNavigationPreload{
 const base::Feature kSharedArrayBuffer{"SharedArrayBuffer",
                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Paint invalidation based on slimming paint. See https://goo.gl/eQczQW
+const base::Feature kSlimmingPaintInvalidation{
+    "SlimmingPaintInvalidation", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Speculatively launches Service Workers on mouse/touch events.
 const base::Feature kSpeculativeLaunchServiceWorker{
     "SpeculativeLaunchServiceWorker", base::FEATURE_DISABLED_BY_DEFAULT};