[kernel] Free memory for kernel data.

runtime/bin/dfe.h

 // Copyright (c) 2017, 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_DFE_H_
 #define RUNTIME_BIN_DFE_H_
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
@@ skipping 16 matching lines @@
   }
 
   void SetKernelBinaries(const char* name);
 
   bool UsePlatformBinary() const { return platform_binary_filename_ != NULL; }
 
   void* kernel_platform() const { return kernel_platform_; }
 
   void* kernel_vmservice_io() const { return kernel_vmservice_io_; }
 
+  void unset_kernel_vmservice_io();
+
   bool kernel_file_specified() const { return kernel_file_specified_; }
   void set_kernel_file_specified(bool value) { kernel_file_specified_ = value; }
 
   // Method to reload a script into a running a isolate.
   // If the specified script [url] is not a kernel IR, compile it first using
   // DFE and then reload the resulting kernel IR into the isolate.
   // Returns Dart_Null if successful, otherwise an error object is returned.
   Dart_Handle ReloadScript(Dart_Isolate isolate, const char* url_string);
 
   // Compiles a script and reads the resulting kernel file.
@@ skipping 34 matching lines @@
   void* kernel_vmservice_io_;
   bool kernel_file_specified_;  // Kernel file was specified on the cmd line.
 
   DISALLOW_COPY_AND_ASSIGN(DFE);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_DFE_H_