- Use a map to lookup libraries by URL.

runtime/vm/service_isolate.cc

 // Copyright (c) 2015, 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/service_isolate.h"
 
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
@@ skipping 483 matching lines @@
     }
   }
   if (server_address_ != NULL) {
     free(server_address_);
     server_address_ = NULL;
   }
 }
 
 
 void ServiceIsolate::BootVmServiceLibrary() {
+  Thread* thread = Thread::Current();
   const Library& vmservice_library =
-      Library::Handle(Library::LookupLibrary(Symbols::DartVMService()));
+      Library::Handle(Library::LookupLibrary(thread, Symbols::DartVMService()));
   ASSERT(!vmservice_library.IsNull());
   const String& boot_function_name = String::Handle(String::New("boot"));
   const Function& boot_function =
       Function::Handle(
           vmservice_library.LookupFunctionAllowPrivate(boot_function_name));
   ASSERT(!boot_function.IsNull());
   const Object& result =
       Object::Handle(
           DartEntry::InvokeFunction(boot_function, Object::empty_array()));
   ASSERT(!result.IsNull());
   Dart_Port port = ILLEGAL_PORT;
   if (result.IsReceivePort()) {
     port = ReceivePort::Cast(result).Id();
   }
   ASSERT(port != ILLEGAL_PORT);
   ServiceIsolate::SetServicePort(port);
 }
 
 }  // namespace dart