Refactor part of handles.cc

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 01e261a95b6470f4857bc8ef841d59727df87741..6d09722035fc610f52b4ee3262164236038ace9f 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -555,6 +555,33 @@ static bool DebuggerWantsEagerCompilation(CompilationInfo* info,
 }
 
 
+// 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;
+
+  // TODO(yangguo): check whether those heuristics are still up-to-date.
+  // We do not shrink objects that go into a snapshot (yet), so we adjust
+  // the estimate conservatively.
+  if (Serializer::enabled()) {
+    estimate += 2;
+  } else if (FLAG_clever_optimizations) {
+    // Inobject slack tracking will reclaim redundant inobject space later,
+    // so we can afford to adjust the estimate generously.
+    estimate += 8;
+  } else {
+    estimate += 3;
+  }
+
+  shared->set_expected_nof_properties(estimate);
+}
+
+
 static Handle<SharedFunctionInfo> MakeFunctionInfo(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
   PostponeInterruptsScope postpone(isolate);