Make header include guards great again

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_
+#ifndef RUNTIME_BIN_LOADER_H_
+#define RUNTIME_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 {
@@ skipping 122 matching lines @@
   static Loader* LoaderForLocked(Dart_Port port);
 
   // 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_
+#endif  // RUNTIME_BIN_LOADER_H_