Remove grow box rect support, renderer part.

third_party/WebKit/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 148 matching lines @@
   }
 
   bool hasOpenedPopup() const override { return false; }
   PopupMenu* openPopupMenu(LocalFrame&, HTMLSelectElement&) override;
   DOMWindow* pagePopupWindowForTesting() const override { return nullptr; }
 
   void setStatusbarText(const String&) override {}
 
   bool tabsToLinks() override { return false; }
 
-  IntRect windowResizerRect(LocalFrame&) const override { return IntRect(); }
-
   void invalidateRect(const IntRect&) override {}
   void scheduleAnimation(Widget*) override {}
 
   IntRect viewportToScreen(const IntRect& r, const Widget*) const override {
     return r;
   }
   float windowToViewportScalar(const float s) const override { return s; }
   WebScreenInfo screenInfo() const override { return WebScreenInfo(); }
   void contentsSizeChanged(LocalFrame*, const IntSize&) const override {}
 
@@ skipping 246 matching lines @@
   ~EmptyContextMenuClient() override {}
   bool showContextMenu(const ContextMenu*, bool) override { return false; }
   void clearContextMenu() override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h