Add first letter test when first letter is inside a floated block.

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 3568 matching lines @@
 
     int scrollbarWidth = instrinsicScrollbarLogicalWidth();
     maxLogicalWidth += scrollbarWidth;
     minLogicalWidth += scrollbarWidth;
 }
 
 void RenderBlock::computePreferredLogicalWidths()
 {
     ASSERT(preferredLogicalWidthsDirty());
 
-    updateFirstLetter();

[esprehn, 2014/07/14 22:55:01]

If you don't call updateFirstLetter() when computing the preferred widths then
the width of a floated block (or one with intrinsic widths like min-content)
will be wrong. It's sad we don't have test coverage.

-
     m_minPreferredLogicalWidth = 0;
     m_maxPreferredLogicalWidth = 0;
 
     // FIXME: The isFixed() calls here should probably be checking for isSpecified since you
     // should be able to use percentage, calc or viewport relative values for width.
     RenderStyle* styleToUse = style();
     if (!isTableCell() && styleToUse->logicalWidth().isFixed() && styleToUse->logicalWidth().value() >= 0
         && !(isDeprecatedFlexItem() && !styleToUse->logicalWidth().intValue()))
         m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalWidth().value());
     else
@@ skipping 1438 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace WebCore