Oilpan: Move ChromeClient classes into Oilpan heap.

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 47 matching lines @@
  since Images are not tied to a page).
  See http://bugs.webkit.org/show_bug.cgi?id=5971 for the original discussion about this file.
 
  Ideally, whenever you change a Client class, you should add a stub here.
  Brittle, yes.  Unfortunate, yes.  Hopefully temporary.
 */
 
 namespace blink {
 
 class CORE_EXPORT EmptyChromeClient : public ChromeClient {
-    WTF_MAKE_FAST_ALLOCATED(EmptyChromeClient);
 public:
+    static PassOwnPtrWillBeRawPtr<EmptyChromeClient> create() { return adoptPtrWillBeNoop(new EmptyChromeClient); }
+
     ~EmptyChromeClient() override {}
     void chromeDestroyed() override {}
 
     void* webView() const override { return nullptr; }
     void setWindowRect(const IntRect&) override {}
     IntRect windowRect() override { return IntRect(); }
 
     IntRect pageRect() override { return IntRect(); }
 
     void focus() override {}
@@ skipping 239 matching lines @@
     ~EmptyDragClient() override {}
     DragDestinationAction actionMaskForDrag(DragData*) override { return DragDestinationActionNone; }
     void startDrag(DragImage*, const IntPoint&, const IntPoint&, DataTransfer*, LocalFrame*, bool) override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 } // namespace blink
 
 #endif // EmptyClients_h