Revert of Revert "Remove obsolete LTR scrollbar padding hack."

Source/core/layout/LayoutBlockFlowLine.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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 1823 matching lines @@
             // Now delete the lines that we failed to sync.
             deleteLineRange(layoutState, originalEndLine, result);
             return matched;
         }
     }
 
     return false;
 }
 
 bool LayoutBlockFlow::generatesLineBoxesForInlineChild(LayoutObject* inlineObj)
-
 {
     ASSERT(inlineObj->parent() == this);
 
     InlineIterator it(LineLayoutBlockFlow(this), LineLayoutItem(inlineObj), 0);
     // FIXME: We should pass correct value for WhitespacePosition.
     while (!it.atEnd() && !requiresLineBox(it))
         it.increment();
 
     return !it.atEnd();
 }
 
-
 void LayoutBlockFlow::addOverflowFromInlineChildren()
 {
     LayoutUnit endPadding = hasOverflowClip() ? paddingEnd() : LayoutUnit();
-    // FIXME: Need to find another way to do this, since scrollbars could show when we don't want them to.
-    if (hasOverflowClip() && !endPadding && node() && node()->isRootEditableElement() && style()->isLeftToRightDirection())
-        endPadding = 1;
     for (RootInlineBox* curr = firstRootBox(); curr; curr = curr->nextRootBox()) {
         addLayoutOverflow(curr->paddedLayoutOverflowRect(endPadding));
         LayoutRect visualOverflow = curr->visualOverflowRect(curr->lineTop(), curr->lineBottom());
         addContentsVisualOverflow(visualOverflow);
     }
 
     if (!containsInlineWithOutlineAndContinuation())
         return;
 
     // Add outline rects of continuations of descendant inlines into visual overflow of this block.
@@ skipping 171 matching lines @@
     LayoutUnit logicalLeft = logicalLeftOffsetForLine(logicalHeight(), false);
     LayoutUnit availableLogicalWidth = logicalRightOffsetForLine(logicalHeight(), false) - logicalLeft;
     updateLogicalWidthForAlignment(textAlign, 0, 0, logicalLeft, totalLogicalWidth, availableLogicalWidth, 0);
 
     if (!style()->isLeftToRightDirection())
         return logicalWidth() - logicalLeft;
     return logicalLeft;
 }
 
 }