Delete a bunch of noop paint invalidation code.

sky/engine/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 66 matching lines @@
 
     virtual void focusedNodeChanged(Node*) override { }
     virtual void focusedFrameChanged(LocalFrame*) override { }
     virtual void show(NavigationPolicy) override { }
 
     virtual bool shouldReportDetailedMessageForSource(const String&) override { return false; }
     virtual void addMessageToConsole(LocalFrame*, MessageSource, MessageLevel, const String&, unsigned, const String&, const String&) override { }
 
     virtual bool tabsToLinks() override { return false; }
 
-    virtual void invalidateContentsAndRootView(const IntRect&) override { }
-    virtual void invalidateContentsForSlowScroll(const IntRect&) override { }
     virtual void scheduleAnimation() override { }
 
     virtual IntRect rootViewToScreen(const IntRect& r) const override { return r; }
     virtual blink::WebScreenInfo screenInfo() const override { return blink::WebScreenInfo(); }
 
     virtual void mouseDidMoveOverElement(const HitTestResult&, unsigned) override { }
 
     virtual void setToolTip(const String&, TextDirection) override { }
 
     virtual void setCursor(const Cursor&) override { }
@@ skipping 84 matching lines @@
     virtual bool canPaste(LocalFrame*, bool defaultValue) const override { return defaultValue; }
 
     virtual bool handleKeyboardEvent() override { return false; }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif  // SKY_ENGINE_CORE_LOADER_EMPTYCLIENTS_H_