Fix build breakage.

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 3648 matching lines @@
     RETURN_NULL_ERROR(native_fields);
   }
   const Class& cls = Class::Handle(isolate, type_obj.type_class());
   const Error& error = Error::Handle(isolate, cls.EnsureIsFinalized(isolate));
   if (!error.IsNull()) {
     // An error occurred, return error object.
     return Api::NewHandle(isolate, error.raw());
   }
   if (num_native_fields != cls.num_native_fields()) {
     return Api::NewError(
-        "%s: invalid number of native fields %d passed in, expected %d",
+        "%s: invalid number of native fields %" Pd " passed in, expected %d",
         CURRENT_FUNC, num_native_fields, cls.num_native_fields());
   }
   const Instance& instance = Instance::Handle(isolate,
                                               AllocateObject(isolate, cls));
   instance.SetNativeFields(num_native_fields, native_fields);
   return Api::NewHandle(isolate, instance.raw());
 }
 
 
 static Dart_Handle SetupArguments(Isolate* isolate,
@@ skipping 1577 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart