Revert of Do V8 GC ASAP if system memory is pressured

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 18 matching lines @@
  */
 
 #include "public/web/WebKit.h"
 
 #include "bindings/core/v8/Microtask.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8GCController.h"
 #include "bindings/core/v8/V8Initializer.h"
 #include "core/animation/AnimationClock.h"
 #include "core/page/Page.h"
-#include "core/workers/WorkerBackingThread.h"
 #include "gin/public/v8_platform.h"
 #include "modules/ModulesInitializer.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/Logging.h"
 #include "platform/heap/Heap.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebThread.h"
 #include "wtf/Assertions.h"
 #include "wtf/WTF.h"
 #include "wtf/allocator/Partitions.h"
@@ skipping 120 matching lines @@
 {
     DCHECK(!reloadPages);
     Page::refreshPlugins();
 }
 
 void decommitFreeableMemory()
 {
     WTF::Partitions::decommitFreeableMemory();
 }
 
-void MemoryPressureNotificationToWorkerThreadIsolates(
-    v8::MemoryPressureLevel level)
-{
-    WorkerBackingThread::
-        MemoryPressureNotificationToWorkerThreadIsolates(level);
-}
-
 } // namespace blink