Update CSS tests to revision 31d63cc79bd4c929ed582229e936d7b389f3e6ab

tests/wpt/css-tests/css-transforms-1_dev/html/transform-stresstest-001.htm

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+<!DOCTYPE html>
+<html><head>
+    <title>CSS Test (Transforms): Inversion Stress Test</title>
+    <link href="mailto:ctalbert@mozilla.com" rel="author" title="Clint Talbert">
+    <link href="mailto:ayg@aryeh.name" rel="author" title="Aryeh Gregor">
+    <link href="http://www.w3.org/TR/css-transforms-1/#two-d-transform-functions" rel="help">
+    <meta content="This simply applies and then inverts a large
+    number of 2D transform functions, and expects the result to be no transform
+    at all.  One extra translateX(100px) is added at the end to ensure that the
+    lack of transform isn't just because the UA parsed it incorrectly, or
+    doesn't support transforms at all." name="assert">
+    <link href="reference/transform-stresstest-ref.htm" rel="match">
+    <style>
+      div {
+        height: 200px;
+        width: 200px;
+        background: gold;
+        transform: skewx(45deg)
+                     translate(50px, 50px)
+                       rotate(45deg)
+                         translatex(50px)
+                           scale(2.0, 4.0)
+                           scale(0.5, 0.25)
+                         translatex(-50px)
+                       rotate(-45deg)
+                     translate(-50px, -50px)
+                   skewx(135deg)
+                   translateX(100px);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  
+
+</body></html>