Inobject slack tracking is done on a per-closure basis instead of per-shared info basis.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 2873525604cf0a777546b64a11d5aac1586b9b22..d70ba997b07558309867fc3341b4c898acb19af2 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -508,9 +508,6 @@ void OptimizedCompileJob::RecordOptimizationStats() {
 // Sets the expected number of properties based on estimate from compiler.
 void SetExpectedNofPropertiesFromEstimate(Handle<SharedFunctionInfo> shared,
                                           int estimate) {
-  // See the comment in SetExpectedNofProperties.
-  if (shared->live_objects_may_exist()) return;
-
   // If no properties are added in the constructor, they are more likely
   // to be added later.
   if (estimate == 0) estimate = 2;