Remove the PaintInvalidation DocumentLifeCycle states.

sky/engine/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
@@ skipping 199 matching lines @@
     void init();
 
     virtual bool isFrameView() const override { return true; }
 
     void forceLayoutParentViewIfNeeded();
     void performPreLayoutTasks();
     void performLayout(RenderObject* rootForThisLayout, bool inSubtreeLayout);
     void scheduleOrPerformPostLayoutTasks();
     void performPostLayoutTasks();
 
-    void invalidateTreeIfNeeded();
-
     DocumentLifecycle& lifecycle() const;
 
     // FIXME(sky): Remove now that we're not a ScrollView?
     void contentsResized();
 
     bool wasViewportResized();
     void sendResizeEventIfNeeded();
 
     void setLayoutSizeInternal(const IntSize&);
 
@@ skipping 74 matching lines @@
         m_view->setCanInvalidatePaintDuringPerformLayout(m_originalValue);
     }
 private:
     FrameView* m_view;
     bool m_originalValue;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_FRAME_FRAMEVIEW_H_