Remove many features when building product mode

runtime/vm/object_id_ring.cc

 // Copyright (c) 2013, 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.
 
 #include "platform/assert.h"
 #include "vm/dart_api_state.h"
 #include "vm/json_stream.h"
 #include "vm/object_id_ring.h"
 
 namespace dart {
 
+#ifndef PRODUCT
+
 void ObjectIdRing::Init(Isolate* isolate, int32_t capacity) {
   ObjectIdRing* ring = new ObjectIdRing(isolate, capacity);
   isolate->set_object_id_ring(ring);
 }
 
 
 ObjectIdRing::~ObjectIdRing() {
   ASSERT(table_ != NULL);
   free(table_);
   table_ = NULL;
@@ skipping 224 matching lines @@
       // Interval #2
       const int32_t max_serial_num = max_serial_;
       const int32_t bottom = max_serial_num - (capacity_ - serial_num_);
       return id >= bottom && bottom < max_serial_num;
     }
   }
   ASSERT(wrapped_ == false);
   return IsValidContiguous(id);
 }
 
+#endif  // !PRODUCT
+
 }  // namespace dart