Include selection rect in paint invalidation for LayoutText.

third_party/WebKit/Source/core/layout/LayoutText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1560 matching lines @@
     if (!style()->isHorizontalWritingMode())
         rect = rect.transposedRect();
     return rect;
 }
 
 LayoutRect LayoutText::localOverflowRectForPaintInvalidation() const
 {
     if (style()->visibility() != VISIBLE)
         return LayoutRect();
 
-    return visualOverflowRect();
+    return unionRect(visualOverflowRect(), localSelectionRect());
 }
 
 LayoutRect LayoutText::localSelectionRect() const
 {
     ASSERT(!needsLayout());
 
     if (getSelectionState() == SelectionNone)
         return LayoutRect();
     LayoutBlock* cb = containingBlock();
     if (!cb)
@@ skipping 107 matching lines @@
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*box, invalidationReason);
         if (box->truncation() != cNoTruncation) {
             if (EllipsisBox* ellipsisBox = box->root().ellipsisBox())
                 paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*ellipsisBox, invalidationReason);
         }
     }
 }
 
 } // namespace blink