Fix bots

runtime/vm/dev_fs.cc

 // Copyright (c) 2016, 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 <map>
 #include <string>
 #include <vector>
 
 #include "vm/dev_fs.h"
 
@@ skipping 90 matching lines @@
   }
 
   void ListFiles(JSONStream* js) {
     JSONObject jsobj(js);
     jsobj.AddProperty("type", "FSFilesList");
     JSONArray jsarr(&jsobj, "files");
     std::map<std::string, std::vector<uint8_t>*>::iterator iter;
     for (iter = files_.begin(); iter != files_.end(); iter++) {
       JSONObject file_info(&jsarr);
       file_info.AddProperty("name", iter->first.c_str());
-      file_info.AddProperty("size", static_cast<int64_t>(iter->second->size()));
+      file_info.AddProperty64("size",
+                              static_cast<int64_t>(iter->second->size()));
     }
   }
 
  private:
   std::string name_;
 
   std::map<std::string, std::vector<uint8_t>*> files_;
 };
 
 // Some static state is held outside of the DevFS class so that we don't
@@ skipping 239 matching lines @@
   }
 
   JSONObject jsobj(js);
   jsobj.AddProperty("type", "FSFile");
   jsobj.AddPropertyBase64("fileContents",
                           &((*file_contents)[0]),
                           file_contents->size());
 }
 
 }  // namespace dart