Support reloading from source on top of a script snapshot.

runtime/vm/isolate.cc

 // Copyright (c) 2013, 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 "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 1084 matching lines @@
          IsolateCreationEnabled();
 #else
   return false;
 #endif
 }
 
 
 #ifndef PRODUCT
 bool Isolate::ReloadSources(JSONStream* js,
                             bool force_reload,
+                            const char* root_script_url,
+                            const char* packages_url,
                             bool dont_delete_reload_context) {
   ASSERT(!IsReloading());
   has_attempted_reload_ = true;
   reload_context_ = new IsolateReloadContext(this, js);
-  reload_context_->Reload(force_reload);
+  reload_context_->Reload(force_reload, root_script_url, packages_url);
   bool success = !reload_context_->reload_aborted();
   if (!dont_delete_reload_context) {
     DeleteReloadContext();
   }
   return success;
 }
 
 
 void Isolate::DeleteReloadContext() {
   // Another thread may be in the middle of GetClassForHeapWalkAt.
@@ skipping 1801 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart