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

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 1472 matching lines @@
 
 class RawExternalTypedData : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(ExternalTypedData);
 
  protected:
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->length_); }
   RawSmi* length_;
   RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->length_); }
 
   uint8_t* data_;
-  void* peer_;
 
   friend class TokenStream;
   friend class RawTokenStream;
 };
 
 
 // VM type for capturing stacktraces when exceptions are thrown,
 // Currently we don't have any interface that this object is supposed
 // to implement so we just support the 'toString' method which
 // converts the stack trace into a string.
@@ skipping 243 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 13);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 14);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 13);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_