Add test data for spaceport benchmark.

chrome/test/data/third_party/spaceport/js/sprites/renderers/canvasDrawImagePartialClearAlign.js

+define([ 'util/ensureCallback', 'sprites/canvas' ], function (ensureCallback, canvas) {
+    function RenderContext(sourceData, frameData) {
+        this.sourceData = sourceData;
+        this.frameData = frameData;
+
+        this.previousTransforms = null;
+        this.previousFrameIndex = null;
+
+        this.canvas = canvas();
+
+        this.context = this.canvas.getContext('2d');
+        this.context.globalCompositeOperation = 'source-over';
+    }
+
+    RenderContext.prototype.load = function load(callback) {
+        callback = ensureCallback(callback);
+
+        // Anything not simply translated is disallowed
+        var isValid = this.frameData.every(function (frame) {
+            return frame.every(function (transform) {
+                return transform.matrix[0] === 1
+                    && transform.matrix[1] === 0
+                    && transform.matrix[3] === 0
+                    && transform.matrix[4] === 1;
+            });
+        });
+
+        if (!isValid) {
+            callback(new Error("Not supported"));
+            return;
+        }
+
+        document.body.appendChild(this.canvas);
+
+        callback(null);
+    };
+
+    RenderContext.prototype.unload = function unload() {
+        if (this.canvas.parentNode) {
+            this.canvas.parentNode.removeChild(this.canvas);
+        }
+    };
+
+    RenderContext.prototype.clear = function clear() {
+        this.canvas.width = this.canvas.width;
+        this.previousTransforms = null;
+    };
+
+    RenderContext.prototype.renderFrame = function renderFrame(frameIndex) {
+        var context = this.context;
+        var sourceData = this.sourceData;
+
+        var transforms = this.frameData[frameIndex];
+        var count = transforms.length;
+        var i;
+
+        var previousTransforms = this.previousTransforms;
+        if (previousTransforms) {
+            var frameInfo = sourceData.getFrameInfo(this.previousFrameIndex);
+            var width = frameInfo.width;
+            var height = frameInfo.height;
+            for (i = 0; i < count; ++i) {
+                var transform = previousTransforms[i];
+                context.setTransform(1, 0, 0, 1, Math.floor(transform.x), Math.floor(transform.y));
+                context.clearRect(0, 0, width, height);
+            }
+        }
+
+        for (i = 0; i < count; ++i) {
+            var transform = transforms[i];
+            context.setTransform(1, 0, 0, 1, Math.floor(transform.x), Math.floor(transform.y));
+            sourceData.drawToCanvas(context, 0, 0, frameIndex);
+        }
+
+        this.previousTransforms = transforms;
+        this.previousFrameIndex = frameIndex;
+    };
+
+    return function (element, frameData) {
+        return new RenderContext(element, frameData);
+    };
+});