Add test data for spaceport benchmark.

chrome/test/data/third_party/spaceport/js/features.js

+define([ ], function () {
+    // CSS transform feature detection based off of
+    // http://andrew-hoyer.com/experiments/rain/
+    // Public domain
+
+    var style = document.createElement('div').style;
+
+    function getFirstIn(object, propertyNames) {
+        return propertyNames.filter(function(name) {
+            return name in object;
+        }).shift();
+    }
+
+    var transformOriginStyleProperty = getFirstIn(style, [
+        'transformOrigin',
+        'WebkitTransformOrigin',
+        'MozTransformOrigin',
+        'msTransformOrigin',
+        'OTransformOrigin'
+    ]);
+
+    var transformStyleProperty = getFirstIn(style, [
+        'transform',
+        'WebkitTransform',
+        'MozTransform',
+        'msTransform',
+        'OTransform'
+    ]);
+
+    var CSSMatrix = window[getFirstIn(window, [
+        'CSSMatrix',
+        'WebKitCSSMatrix',
+        'WebkitCSSMatrix'
+    ])];
+
+    // Firefox has a bug where it requires 'px' for translate matrix
+    // elements (where it should accept plain numbers).
+    var matrixTranslateSuffix = transformStyleProperty === 'MozTransform' ? 'px' : '';
+
+    return {
+        transformOriginStyleProperty: transformOriginStyleProperty,
+        transformStyleProperty: transformStyleProperty,
+        matrixTranslateSuffix: matrixTranslateSuffix,
+        CSSMatrix: CSSMatrix
+    }
+});