import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/writing-mode/abspos/s71-abs-pos-non-replaced-vlr-031.xht

@@ -0,0 +1,101 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+ <head>
+
+  <title>CSS Writing Modes Test: absolutely positioned non-replaced element - 'direction: ltr' and 'top' and 'bottom' are 'auto' and 'height' is not 'auto'</title>
+
+  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
+  <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#vertical-layout" title="7.1 Principles of Layout in Vertical Writing Modes" />
+  <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width" title="10.3.7 Absolutely positioned, non-replaced elements" />
+  <link rel="match" href="s71-abs-pos-non-replaced-vlr-007-ref.xht" />
+
+  <meta name="flags" content="ahem image" />
+  <meta name="assert" content="When 'direction' is 'ltr' and 'top' and 'bottom' are 'auto' and 'height' is not 'auto', then set 'top' to static position and solve for 'bottom'." />
+
+  <link type="text/css" rel="stylesheet" href="support/ahem.css" />
+
+  <style type="text/css"><![CDATA[
+  html
+    {
+      -ah-writing-mode: vertical-lr;
+      -webkit-writing-mode: vertical-lr;
+      writing-mode: tb-lr; /* IE11 */
+      writing-mode: vertical-lr;
+    }
+
+  div#containing-block
+    {
+      background: red url("support/bg-red-2col-3row-320x320.png");
+      color: transparent;
+      direction: ltr;
+      font: 80px/1 Ahem;
+      height: 320px;
+      position: relative;
+      width: 320px;
+
+    }
+
+  div#containing-block > span
+    {
+      background-color: red;
+      bottom: auto;
+      color: green;
+      height: 1em;
+      position: absolute;
+      top: auto;
+    }
+
+/*
+"
+Layout calculation rules (such as those in CSS2.1, Section 10.3) that apply to the horizontal dimension in horizontal writing modes instead apply to the vertical dimension in vertical writing modes.
+"
+7.1 Principles of Layout in Vertical Writing Modes
+http://www.w3.org/TR/css-writing-modes-3/#vertical-layout
+
+So here, *-top and *-bottom properties are input into the §10.3.7 algorithms where *-top properties refer to *-left properties in the layout rules and where *-bottom properties refer to *-right properties in the layout rules.
+
+"
+2. 'left' and 'right' are 'auto' and 'width' is not 'auto', then if the 'direction' property of the element establishing the static-position containing block is 'ltr' set 'left' to the static position, otherwise set 'right' to the static position. Then solve for 'left' (if 'direction is 'rtl') or 'right' (if 'direction' is 'ltr').
+"
+
+'top' + 'margin-top' + 'border-top-width' + 'padding-top' + 'height' + 'padding-bottom' + 'border-bottom-width' + 'margin-bottom' + 'bottom' = height of containing block
+
+So:
+
+    160px : top: auto: set to static position
+  +
+      0px : margin-top
+  +
+      0px : border-top-width
+  +
+      0px : padding-top
+  +
+     80px : height
+  +
+      0px : padding-bottom
+  +
+      0px : border-bottom-width
+  +
+      0px : margin-bottom
+  +
+  (solve) : bottom: auto
+    =====================
+    320px : height of containing block
+
+And so computed bottom value must be 80px .
+*/
+
+  ]]></style>
+
+ </head>
+
+ <body>
+
+  <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p>
+
+  <div id="containing-block">1 2 34<span>X</span></div>
+
+ </body>
+</html>