Fix for Flutter issue 11260 (https://github.com/flutter/flutter/issues/11260)

runtime/bin/isolate_data.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_BIN_ISOLATE_DATA_H_
 #define RUNTIME_BIN_ISOLATE_DATA_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/globals.h"
@@ skipping 33 matching lines @@
   void set_builtin_lib(Dart_Handle lib) {
     ASSERT(builtin_lib_ == NULL);
     ASSERT(lib != NULL);
     ASSERT(!Dart_IsError(lib));
     builtin_lib_ = Dart_NewPersistentHandle(lib);
   }
 
   char* script_url;
   char* package_root;
   char* packages_file;
-  uint8_t* udp_receive_buffer;
   void* kernel_program;
 
   void UpdatePackagesFile(const char* packages_file_) {
     if (packages_file != NULL) {
       free(packages_file);
       packages_file = NULL;
     }
     packages_file = strdup(packages_file_);
   }
 
@@ skipping 20 matching lines @@
   AppSnapshot* app_snapshot_;
   MallocGrowableArray<char*>* dependencies_;
 
   DISALLOW_COPY_AND_ASSIGN(IsolateData);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_ISOLATE_DATA_H_