Activate the service isolate for all precompiled tests.

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 BIN_LOADER_H_
 #define 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);
+
   // 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);
 
   Dart_Handle error() const {
     return error_;
   }
 
  private:
@@ skipping 87 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  // BIN_LOADER_H_