Synthesize preserveAspectRatio='none' for non-viewBoxed <img>

third_party/WebKit/LayoutTests/svg/as-image/resources/synthesized-viewbox-par-helper.js

+'use strict';
+
+function makeSvgImageUrl(width, height, viewBox, pAR) {
+  var data = '<svg xmlns="http://www.w3.org/2000/svg"';
+  data += ' width="' + width + '"';
+  data += ' height="' + height + '"'
+  if (viewBox)
+    data += ' viewBox="' + viewBox + '"';
+  if (pAR)
+    data += ' preserveAspectRatio="' + pAR + '"';
+  data += '><circle cx="100" cy="100" r="100" fill="blue"/></svg>';
+  return 'data:image/svg+xml,' + encodeURIComponent(data);
+}
+
+function makeImage(config) {
+  var img = new Image();
+  img.src = makeSvgImageUrl(config.svgWidthAttr, config.svgHeightAttr);
+  img.style.width = config.placeholderWidthAttr;
+  img.style.height = config.placeholderHeightAttr;
+  return img;
+}
+
+function makeReference(config) {
+  var testData = new TestData(config);
+  var intrinsic = testData.intrinsicInformation();
+  var rect = testData.computeInlineReplacedSize();
+  // Simplified for the case of percentages (assumes 100% in that case.)
+  var viewBox = "0 0 " + (intrinsic.width || rect.width) + " " + (intrinsic.height || rect.height);
+  var img = new Image();
+  img.src = makeSvgImageUrl(rect.width, rect.height, viewBox, "none");
+  img.style.width = rect.width;
+  img.style.height = rect.height;
+  return img;
+}