Consistency in LayoutReplaced::computeReplacedLogicalWidth()

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. 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 558 matching lines @@
             if (intrinsicRatio && ((computedHeightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !computedHeightIsAuto)) {
                 LayoutUnit logicalHeight = computeReplacedLogicalHeight();
                 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalHeight * intrinsicRatio, shouldComputePreferred);
             }
 
             // If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
             // 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
             // the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
             if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) {
                 if (shouldComputePreferred == ComputePreferred)
-                    return 0;
+                    return computeReplacedLogicalWidthRespectingMinMaxWidth(0, ComputePreferred);
                 // The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
                 // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
                 LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth();
 
                 // This solves above equation for 'width' (== logicalWidth).
                 LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth);
                 LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth);
                 logicalWidth = std::max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (size().width() - clientWidth())));
                 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred);
             }
@@ skipping 155 matching lines @@
     // We only include the space below the baseline in our layer's cached paint invalidation rect if the
     // image is selected. Since the selection state has changed update the rect.
     if (hasLayer())
         setPreviousPaintInvalidationRect(boundsRectForPaintInvalidation(containerForPaintInvalidation()));
 
     if (canUpdateSelectionOnRootLineBoxes())
         inlineBoxWrapper()->root().setHasSelectedChildren(state != SelectionNone);
 }
 
 }