Do not use object pool for VM heap objects on ARM.

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 2310 matching lines @@
   }
 
  private:
   void set_size(intptr_t size) const {
     raw_ptr()->size_ = size;
   }
   void set_code(RawCode* code) const {
     raw_ptr()->code_ = code;
   }
   void set_object_pool(RawArray* object_pool) const {
-    ASSERT(object_pool->IsOldObject());
-    raw_ptr()->object_pool_ = object_pool;
+    StorePointer(&raw_ptr()->object_pool_, object_pool);
   }
 
   // New is a private method as RawInstruction and RawCode objects should
   // only be created using the Code::FinalizeCode method. This method creates
   // the RawInstruction and RawCode objects, sets up the pointer offsets
   // and links the two in a GC safe manner.
   static RawInstructions* New(intptr_t size);
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Instructions, Object);
   friend class Class;
@@ skipping 4591 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_