Rename repaint to paintInvalidation for remaining methods.

Source/core/rendering/RenderScrollbar.cpp

 /*
  * Copyright (C) 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 128 matching lines @@
 
 PassRefPtr<RenderStyle> RenderScrollbar::getScrollbarPseudoStyle(ScrollbarPart partType, PseudoId pseudoId)
 {
     if (!owningRenderer())
         return nullptr;
 
     RefPtr<RenderStyle> result = owningRenderer()->getUncachedPseudoStyle(PseudoStyleRequest(pseudoId, this, partType), owningRenderer()->style());
     // Scrollbars for root frames should always have background color
     // unless explicitly specified as transparent. So we force it.
     // This is because WebKit assumes scrollbar to be always painted and missing background
-    // causes visual artifact like non-repainted dirty region.
+    // causes visual artifact like non-paint invalidated dirty region.
     if (result && m_owningFrame && m_owningFrame->view() && !m_owningFrame->view()->isTransparent() && !result->hasBackground())
         result->setBackgroundColor(StyleColor(Color::white));
 
     return result;
 }
 
 void RenderScrollbar::updateScrollbarParts(bool destroy)
 {
     updateScrollbarPart(ScrollbarBGPart, destroy);
     updateScrollbarPart(BackButtonStartPart, destroy);
@@ skipping 182 matching lines @@
 int RenderScrollbar::minimumThumbLength()
 {
     RenderScrollbarPart* partRenderer = m_parts.get(ThumbPart);
     if (!partRenderer)
         return 0;
     partRenderer->layout();
     return orientation() == HorizontalScrollbar ? partRenderer->width() : partRenderer->height();
 }
 
 }