Remove isolate argument from handle allocation: Part II

runtime/vm/snapshot.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_SNAPSHOT_H_
 #define VM_SNAPSHOT_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
@@ skipping 956 matching lines @@
     ASSERT(forward_list_ == NULL);
     forward_list_ = forward_list;
   }
   void ResetForwardList() {
     ASSERT(forward_list_ != NULL);
     forward_list_ = NULL;
   }
 
   Thread* thread() const { return thread_; }
   Isolate* isolate() const { return thread_->isolate(); }
+  Zone* zone() const { return thread_->zone(); }
   ObjectStore* object_store() const { return object_store_; }
 
  private:
   Snapshot::Kind kind_;
   Thread* thread_;
   ObjectStore* object_store_;  // Object store for common classes.
   ClassTable* class_table_;  // Class table for the class index to class lookup.
   ForwardList* forward_list_;
   InstructionsWriter* instructions_writer_;
   Exceptions::ExceptionType exception_type_;  // Exception type.
@@ skipping 147 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_