Rename repaint to paintInvalidation for remaining methods.

Source/core/rendering/RenderSliderContainer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 124 matching lines @@
     if (isVertical)
         thumbLocation.setY(thumbLocation.y() + track->contentHeight() - thumb->height() - offset);
     else if (style()->isLeftToRightDirection())
         thumbLocation.setX(thumbLocation.x() + offset);
     else
         thumbLocation.setX(thumbLocation.x() - offset);
     thumb->setLocation(thumbLocation);
 
     // We need one-off invalidation code here because painting of the timeline element does not go through style.
     // Instead it has a custom implementation in C++ code.
-    // Therefore the style system cannot understand when it needs to be repainted.
+    // Therefore the style system cannot understand when it needs to be paint invalidated.
     setShouldDoFullPaintInvalidation(true);
 }
 
 } // namespace blink