Fix Dartium build:

runtime/bin/main.cc

 // Copyright (c) 2012, 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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/dbg_connection.h"
 #include "bin/directory.h"
 #include "bin/eventhandler.h"
 #include "bin/extensions.h"
 #include "bin/file.h"
 #include "bin/isolate_data.h"
 #include "bin/log.h"
 #include "bin/platform.h"
 #include "bin/process.h"
+#include "bin/thread.h"
 #include "bin/vmservice_impl.h"
 #include "platform/globals.h"
 #include "platform/hashmap.h"
 
 namespace dart {
 namespace bin {
 
 // snapshot_buffer points to a snapshot if we link in a snapshot otherwise
 // it is initialized to NULL.
 extern const uint8_t* snapshot_buffer;
@@ skipping 946 matching lines @@
       // Will set the VM flags, print them out and then we exit as no
       // script was specified on the command line.
       Dart_SetVMFlags(vm_options.count(), vm_options.arguments());
       exit(0);
     } else {
       PrintUsage();
       exit(kErrorExitCode);
     }
   }
 
+  Thread::InitOnce();
+
   if (!DartUtils::SetOriginalWorkingDirectory()) {
     OSError err;
     fprintf(stderr, "Error determining current directory: %s\n", err.message());
     fflush(stderr);
     exit(kErrorExitCode);
   }
 
   Dart_SetVMFlags(vm_options.count(), vm_options.arguments());
 
   // Initialize the Dart VM.
@@ skipping 180 matching lines @@
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }