Conditionally create PaintLayer's scrollable area object

third_party/WebKit/Source/core/layout/LayoutTextControlSingleLine.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 156 matching lines @@
         hitInnerEditorElement(result, pointInParent, accumulatedOffset);
     }
     return true;
 }
 
 void LayoutTextControlSingleLine::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
 {
     LayoutTextControl::styleDidChange(diff, oldStyle);
     if (HTMLElement* placeholder = inputElement()->placeholderElement())
         placeholder->setInlineStyleProperty(CSSPropertyTextOverflow, textShouldBeTruncated() ? CSSValueEllipsis : CSSValueClip);
-    setHasOverflowClip(false);
 }
 
 void LayoutTextControlSingleLine::capsLockStateMayHaveChanged()
 {
     if (!node())
         return;
 
     // Only draw the caps lock indicator if these things are true:
     // 1) The field is a password field
     // 2) The frame is active
@@ skipping 175 matching lines @@
     // inner-editor element overflows the INPUT box intentionally, however it
     // shouldn't affect outside of the INPUT box.  So we ignore child overflow.
 }
 
 HTMLInputElement* LayoutTextControlSingleLine::inputElement() const
 {
     return toHTMLInputElement(node());
 }
 
 } // namespace blink