Fix build failures in precompiled runtime

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 RUNTIME_VM_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 4667 matching lines @@
 
   RawCodeSourceMap* code_source_map() const {
     return raw_ptr()->code_source_map_;
   }
 
   void set_code_source_map(const CodeSourceMap& code_source_map) const {
     ASSERT(code_source_map.IsOld());
     StorePointer(&raw_ptr()->code_source_map_, code_source_map.raw());
   }
 
-  RawArray* await_token_positions() const {
-#if defined(DART_PRECOMPILED_RUNTIME)
-    return Array::null();
-#else
-    return raw_ptr()->await_token_positions_;
-#endif
-  }
-
+  RawArray* await_token_positions() const;
   void SetAwaitTokenPositions(const Array& await_token_positions) const;
 
   // Used during reloading (see object_reload.cc). Calls Reset on all ICDatas
   // that are embedded inside the Code object.
   void ResetICDatas(Zone* zone) const;
 
   // Array of DeoptInfo objects.
   RawArray* deopt_info_array() const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     UNREACHABLE();
@@ skipping 4218 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_