Fix Ruby visual rects in flipped blocks writing mode.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple 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 1078 matching lines @@
     }
 
     // FIXME: We ignore the lightweight clipping rect that controls use, since if |o| is in mid-layout,
     // its controlClipRect will be wrong. For overflow clip we use the values cached by the layer.
     rect.setLocation(topLeft);
 
     LayoutBox* containerBox = container->isBox() ? toLayoutBox(container) : nullptr;
     if (containerBox && !containerBox->mapScrollingContentsRectToBoxSpace(rect, container == ancestor ? ApplyNonScrollOverflowClip : ApplyOverflowClip, visualRectFlags))
         return false;
 
-    if (containerBox)
+    if (containerBox && !isRuby())

[wkorman, 2016/07/20 22:14:52]

This was needed to avoid losing the topLeft location of the rect being mapped
when we move from LayoutRuby (inline) RUBY to the container. Logging snippet and
layout tree below:

[1:1:0720/132538:1038859601405:ERROR:LayoutInline.cpp(1073)] "LayoutRuby
(inline) RUBY", rect="20.000000,2.000000 12.000000x4.000000"
[1:1:0720/132538:1038859601598:ERROR:LayoutBox.cpp(2129)] obj="LayoutBlockFlow
DIV", container="LayoutBlockFlow BODY", container->isBox()=1,
containingBlock="LayoutBlockFlow BODY", origTopLeft="0.000000,2.000000",
topLeftLocation="0.000000,0.000000", inputRect="0.000000,2.000000
12.000000x4.000000", outputRect="0.000000,2.000000 12.000000x4.000000"

  LayoutBlockFlow {HTML} at (0,0) size 800x24
    LayoutBlockFlow {BODY} at (8,8) size 784x8
      LayoutBlockFlow {DIV} at (0,0) size 32x8
        LayoutRuby (inline) {RUBY} at (0,0) size 19x8
          LayoutRubyRun (anonymous) at (12,0) size 20x8
            LayoutRubyText {RT} at (-12,0) size 12x8
              LayoutText {#text} at (0,2) size 12x4
                text run at (0,2) width 4: "c"
            LayoutRubyBase (anonymous) at (0,0) size 20x8
              LayoutText {#text} at (0,0) size 19x8
                text run at (0,0) width 8: "b"
        LayoutText {#text} at (0,0) size 0x0

         containerBox->flipForWritingMode(rect);
     return container->mapToVisualRectInAncestorSpace(ancestor, rect, visualRectFlags);
 }
 
 LayoutSize LayoutInline::offsetFromContainer(const LayoutObject* container) const
 {
     ASSERT(container == this->container());
 
     LayoutSize offset;
     if (isInFlowPositioned())
@@ skipping 242 matching lines @@
 
 void LayoutInline::invalidateDisplayItemClients(PaintInvalidationReason invalidationReason) const
 {
     LayoutBoxModelObject::invalidateDisplayItemClients(invalidationReason);
 
     for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox())
         invalidateDisplayItemClient(*box, invalidationReason);
 }
 
 } // namespace blink