Run field initializers for new instance fields after a reload

runtime/vm/isolate_reload.h

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_ISOLATE_RELOAD_H_
 #define RUNTIME_VM_ISOLATE_RELOAD_H_
 
 #include "include/dart_tools_api.h"
 
 #include "vm/hash_map.h"
@@ skipping 40 matching lines @@
 
 
 class InstanceMorpher : public ZoneAllocated {
  public:
   InstanceMorpher(Zone* zone, const Class& from, const Class& to);
   virtual ~InstanceMorpher() {}
 
   // Called on each instance that needs to be morphed.
   RawInstance* Morph(const Instance& instance) const;
 
+  void RunNewFieldInitializers() const;
+
   // Adds an object to be morphed.
   void AddObject(RawObject* object) const;
 
   // Create the morphed objects based on the before() list.
   void CreateMorphedCopies() const;
 
   // Dump the state of the morpher.
   void Dump() const;
 
   // Append the morper info to JSON array.
   void AppendTo(JSONArray* array);
 
   // Returns the list of objects that need to be morphed.
   ZoneGrowableArray<const Instance*>* before() const { return before_; }
   // Returns the list of morphed objects (matches order in before()).
   ZoneGrowableArray<const Instance*>* after() const { return after_; }
+  // Returns the list of new fields.
+  ZoneGrowableArray<const Field*>* new_fields() const { return new_fields_; }
 
   // Returns the cid associated with the from_ and to_ class.
   intptr_t cid() const { return cid_; }
 
  private:
   const Class& from_;
   const Class& to_;
   ZoneGrowableArray<intptr_t> mapping_;
   ZoneGrowableArray<const Instance*>* before_;
   ZoneGrowableArray<const Instance*>* after_;
+  ZoneGrowableArray<const Field*>* new_fields_;
   intptr_t cid_;
 
   void ComputeMapping();
   void DumpFormatFor(const Class& cls) const;
 };
 
 
 class ReasonForCancelling : public ZoneAllocated {
  public:
   explicit ReasonForCancelling(Zone* zone) {}
@@ skipping 245 matching lines @@
   friend class ObjectLocator;
   friend class MarkFunctionsForRecompilation;  // IsDirty.
   friend class ReasonForCancelling;
 
   static Dart_FileModifiedCallback file_modified_callback_;
 };
 
 }  // namespace dart
 
 #endif   // RUNTIME_VM_ISOLATE_RELOAD_H_