Mark when we may have been invalidated to early out on repaintTreeAfterLayout.

Source/core/rendering/RenderTextControlSingleLine.cpp

 /**
  * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 77 matching lines @@
 
 LayoutUnit RenderTextControlSingleLine::computeLogicalHeightLimit() const
 {
     return containerElement() ? contentLogicalHeight() : logicalHeight();
 }
 
 void RenderTextControlSingleLine::layout()
 {
     SubtreeLayoutScope layoutScope(*this);
 
+    setMayNeedInvalidation(true);
+
     // FIXME: We should remove the height-related hacks in layout() and
     // styleDidChange(). We need them because
     // - Center the inner elements vertically if the input height is taller than
     //   the intrinsic height of the inner elements.
     // - Shrink the inner elment heights if the input height is samller than the
     //   intrinsic heights of the inner elements.
 
     // We don't honor paddings and borders for textfields without decorations
     // and type=search if the text height is taller than the contentHeight()
     // because of compability.
@@ skipping 57 matching lines @@
     if (!container && innerTextRenderer && innerTextRenderer->height() != contentLogicalHeight()) {
         LayoutUnit logicalHeightDiff = innerTextRenderer->logicalHeight() - contentLogicalHeight();
         innerTextRenderer->setLogicalTop(innerTextRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
     } else
         centerContainerIfNeeded(containerRenderer);
 
     HTMLElement* placeholderElement = inputElement()->placeholderElement();
     if (RenderBox* placeholderBox = placeholderElement ? placeholderElement->renderBox() : 0) {
         LayoutSize innerTextSize;
 
+        placeholderBox->setMayNeedInvalidation(true);
+
         if (innerTextRenderer)
             innerTextSize = innerTextRenderer->size();
         placeholderBox->style()->setWidth(Length(innerTextSize.width() - placeholderBox->borderAndPaddingWidth(), Fixed));
         placeholderBox->style()->setHeight(Length(innerTextSize.height() - placeholderBox->borderAndPaddingHeight(), Fixed));
         bool neededLayout = placeholderBox->needsLayout();
         bool placeholderBoxHadLayout = placeholderBox->everHadLayout();
         placeholderBox->layoutIfNeeded();
         LayoutPoint textOffset;
         if (innerTextRenderer)
             textOffset = innerTextRenderer->location();
@@ skipping 239 matching lines @@
     if (innerTextElement())
         innerTextElement()->setScrollTop(newTop);
 }
 
 HTMLInputElement* RenderTextControlSingleLine::inputElement() const
 {
     return toHTMLInputElement(node());
 }
 
 }