Disable display: contents in SVG.

third_party/WebKit/Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 3691 matching lines @@
   }
 
   static bool isDisplayReplacedType(EDisplay display) {
     return display == EDisplay::InlineBlock ||
            display == EDisplay::WebkitInlineBox ||
            display == EDisplay::InlineFlex ||
            display == EDisplay::InlineTable || display == EDisplay::InlineGrid;
   }
 
   static bool isDisplayInlineType(EDisplay display) {
-    return display == EDisplay::Inline || isDisplayReplacedType(display);
+    return display == EDisplay::Inline || display == EDisplay::Contents ||
+           isDisplayReplacedType(display);

[rune, 2017/02/09 09:41:10]

display:contents is neither an inline, nor block type display, so this looks
wrong even if it works. How did this work for other replaced content like input
elements in your other CL? (or was the csswg imported replaced content test
skipped?)

[emilio, 2017/02/09 11:49:37]

Replaced content was ignored in that CL, but actually I've been going through
the spec and I need to make it compute to inline for those (this was recently
changed[1], in Gecko's implementation display: contents is just ignored).

Would you be fine landing this as-is a temporary measure and I'll make that
change either with all the other style adjustment changes in that CL, or in a
followup CL?

[1]: https://github.com/w3c/csswg-drafts/issues/540

   }
 
   static bool isDisplayTableType(EDisplay display) {
     return display == EDisplay::Table || display == EDisplay::InlineTable ||
            display == EDisplay::TableRowGroup ||
            display == EDisplay::TableHeaderGroup ||
            display == EDisplay::TableFooterGroup ||
            display == EDisplay::TableRow ||
            display == EDisplay::TableColumnGroup ||
            display == EDisplay::TableColumn || display == EDisplay::TableCell ||
@@ skipping 193 matching lines @@
   m_nonInheritedData.m_pseudoBits |= 1 << (pseudo - 1);
 }
 
 inline bool ComputedStyle::hasPseudoElementStyle() const {
   return m_nonInheritedData.m_pseudoBits & ElementPseudoIdMask;
 }
 
 }  // namespace blink
 
 #endif  // ComputedStyle_h