Fix for issue 1456 - register libraries read from a partial snapshot

vm/dart_api_impl.cc

 // Copyright (c) 2011, 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 "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 2272 matching lines @@
     return Api::NewError("%s: A script has already been loaded from '%s'.",
                          CURRENT_FUNC, library_url.ToCString());
   }
   SnapshotReader reader(snapshot, isolate);
   const Object& tmp = Object::Handle(reader.ReadObject());
   if (!tmp.IsLibrary()) {
     return Api::NewError("%s: Unable to deserialize snapshot correctly.",
                          CURRENT_FUNC);
   }
   library ^= tmp.raw();
-  library.Register();
   isolate->object_store()->set_root_library(library);
   return Api::NewLocalHandle(library);
 }
 
 
 static void CompileAll(Isolate* isolate, Dart_Handle* result) {
   *result = Api::Success();
   ASSERT(isolate != NULL);
   LongJump* base = isolate->long_jump_base();
   LongJump jump;
@@ skipping 188 matching lines @@
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 
 }  // namespace dart