Attempt to fix the linker issues by wrapping the template call with a helper

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 1493 matching lines @@
                                           MemberKind kind) const;
   RawField* LookupField(const String& name, MemberKind kind) const;
 
   RawFunction* LookupAccessorFunction(const char* prefix,
                                       intptr_t prefix_length,
                                       const String& name) const;
 
   // Allocate an instance class which has a VM implementation.
   template <class FakeInstance> static RawClass* New(intptr_t id);
 
+  // Helper that calls 'Class::New<Instance>(kIllegalCid)'.
+  static RawClass* NewInstanceClass();
+
   // Check the subtype or 'more specific' relationship.
   bool TypeTest(TypeTestKind test_kind,
                 const TypeArguments& type_arguments,
                 const Class& other,
                 const TypeArguments& other_type_arguments,
                 Error* bound_error,
                 TrailPtr bound_trail,
                 Heap::Space space) const;
 
   static bool TypeTestNonRecursive(
@@ skipping 7078 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_