1. Delete prolog weak persistent handles when shutting down an isolate

runtime/vm/object.h

 // Copyright (c) 2012, 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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 6069 matching lines @@
   TypedDataElementType ElementType() const {
     intptr_t cid = raw()->GetClassId();
     return ElementType(cid);
   }
 
   intptr_t LengthInBytes() const {
     intptr_t cid = raw()->GetClassId();
     return (ElementSizeInBytes(cid) * Length());
   }
 
-  void* GetPeer() const {
-    return raw_ptr()->peer_;
-  }
-
   void* DataAddr(intptr_t byte_offset) const {
     ASSERT((byte_offset == 0) ||
            ((byte_offset > 0) && (byte_offset < LengthInBytes())));
     return reinterpret_cast<void*>(raw_ptr()->data_ + byte_offset);
   }
 
 #define TYPED_GETTER_SETTER(name, type)                                        \
   type Get##name(intptr_t byte_offset) const {                                 \
     return *reinterpret_cast<type*>(DataAddr(byte_offset));                    \
   }                                                                            \
@@ skipping 59 matching lines @@
 
  protected:
   void SetLength(intptr_t value) const {
     raw_ptr()->length_ = Smi::New(value);
   }
 
   void SetData(uint8_t* data) const {
     raw_ptr()->data_ = data;
   }
 
-  void SetPeer(void* peer) const {
-    raw_ptr()->peer_ = peer;
-  }
-
  private:
   FINAL_HEAP_OBJECT_IMPLEMENTATION(ExternalTypedData, Instance);
   friend class Class;
 };
 
 
 class TypedDataView : public AllStatic {
  public:
   static intptr_t ElementSizeInBytes(const Instance& view_obj) {
     ASSERT(!view_obj.IsNull());
@@ skipping 444 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_