Refactor DeoptimizeDependentCodeGroup.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cdf1e2455d2c0e93c829a70955d900db54c32dba..94acf5056d6fc7952901cd38af8343ea3a77bc0a 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5642,6 +5642,9 @@ class DependentCode: public FixedArray {
   void DeoptimizeDependentCodeGroup(Isolate* isolate,
                                     DependentCode::DependencyGroup group);
 
+  bool MarkCodeForDeoptimization(Isolate* isolate,
+                                 DependentCode::DependencyGroup group);
+
   // The following low-level accessors should only be used by this class
   // and the mark compact collector.
   inline int number_of_entries(DependencyGroup group);