Add test data for spaceport benchmark.

chrome/test/data/third_party/spaceport/js/sprites/sources/image.js

+define([ 'util/ensureCallback' ], function (ensureCallback) {
+    var IMAGE_SRC = 'assets/html5-logo.png';
+
+    function ImageSource(img) {
+        this.img = img;
+
+        this.frameInfo = {
+            x: 0,
+            y: 0,
+            width: img.width,
+            height: img.height,
+            image: img,
+            sheetImage: img
+        };
+    }
+
+    ImageSource.prototype.getImage = function getImage(frameIndex) {
+        return this.img;
+    };
+
+    ImageSource.prototype.drawToCanvas = function drawToCanvas(context, dx, dy, frameIndex) {
+        context.drawImage(this.img, dx, dy);
+    };
+
+    ImageSource.prototype.getFrameInfo = function getFrameInfo(frameIndex) {
+        return this.frameInfo;
+    };
+
+    return function image(callback) {
+        callback = ensureCallback(callback);
+
+        var img = new window.Image();
+        img.onload = function () {
+            var imageSource = new ImageSource(img);
+            callback(null, imageSource);
+        };
+        img.src = IMAGE_SRC;
+    };
+});