scheduler: Tell v8 about the current RAIL mode

third_party/WebKit/Source/web/WebKit.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 168 matching lines @@
     WTF::Partitions::decommitFreeableMemory();
 }
 
 void MemoryPressureNotificationToWorkerThreadIsolates(
     v8::MemoryPressureLevel level)
 {
     WorkerBackingThread::
         MemoryPressureNotificationToWorkerThreadIsolates(level);
 }
 
+void setRAILModeOnWorkerThreadIsolates(v8::RAILMode railMode)
+{
+    WorkerBackingThread::setRAILModeOnWorkerThreadIsolates(railMode);
+}
+
 } // namespace blink