Reload native extensions when starting from a snapshot.

runtime/bin/loader.h

 // 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.
 
 #ifndef RUNTIME_BIN_LOADER_H_
 #define RUNTIME_BIN_LOADER_H_
 
 #include "bin/isolate_data.h"
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "bin/thread.h"
 
 namespace dart {
 namespace bin {
 
 class Loader {
  public:
   explicit Loader(IsolateData* isolate_data);
   ~Loader();
 
   static void InitForSnapshot(const char* snapshot_uri);
 
+  static Dart_Handle ReloadNativeExtensions();
+
   // Loads contents of the specified url.
   static Dart_Handle LoadUrlContents(Dart_Handle url,
                                      uint8_t** payload,
                                      intptr_t* payload_length);
 
 
   // A static tag handler that hides all usage of a loader for an isolate.
   static Dart_Handle LibraryTagHandler(Dart_LibraryTag tag,
                                        Dart_Handle library,
                                        Dart_Handle url);
@@ skipping 102 matching lines @@
 
   // This is the global callback for the native message handlers.
   static void NativeMessageHandler(Dart_Port dest_port_id,
                                    Dart_CObject* message);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_LOADER_H_