Expose ImageData on WorkerGlobalScope.

LayoutTests/fast/canvas/script-tests/canvas-ImageData.js

-description("Test ImageData constructor");
-
-function setRGBA(imageData, i, rgba) {
-    var s = i * 4;
-    imageData[s] = rgba[0];
-    imageData[s + 1] = rgba[1];
-    imageData[s + 2] = rgba[2];
-    imageData[s + 3] = rgba[3];
-}
-
-function getRGBA(imageData, i) {
-    var result = [];
-    var s = i * 4;
-    for (var j = 0; j < 4; j++) {
-        result[j] = imageData[s + j];
-    }
-    return result;
-}
-
-shouldBeDefined("ImageData");
-shouldBe("ImageData.length", "2");
-
-imageData = new ImageData(100, 50);
-
-shouldBeNonNull("imageData");
-shouldBeNonNull("imageData.data");
-shouldBe("imageData.width", "100");
-shouldBe("imageData.height", "50");
-shouldBe("getRGBA(imageData.data, 4)", "[0, 0, 0, 0]");
-
-var testColor = [0, 255, 255, 128];
-setRGBA(imageData.data, 4, testColor);
-shouldBe("getRGBA(imageData.data, 4)", "testColor");
-
-shouldThrow("new ImageData(10)");
-shouldThrow("new ImageData(0, 10)");
-shouldThrow("new ImageData(10, 0)");
-shouldThrow("new ImageData('width', 'height')");
-shouldThrow("new ImageData(1 << 31, 1 << 31)");
-
-shouldThrow("new ImageData(new Uint8ClampedArray(0))");
-shouldThrow("new ImageData(new Uint8Array(100), 25)");
-shouldThrow("new ImageData(new Uint8ClampedArray(27), 2)");
-shouldThrow("new ImageData(new Uint8ClampedArray(104), 14)");
-shouldThrow("new ImageData(imageData.data, 0)");
-shouldThrow("new ImageData(imageData.data, 13)");
-shouldThrow("new ImageData(imageData.data, 1 << 31)");
-shouldThrow("new ImageData(imageData.data, 'biggish')");
-shouldThrow("new ImageData(imageData.data, 1 << 24, 1 << 31)");
-
-imageDataFromData = new ImageData(imageData.data, 100);
-shouldBe("imageDataFromData.width", "100");
-shouldBe("imageDataFromData.height", "50");
-shouldBe("imageDataFromData.data", "imageData.data");
-shouldBe("getRGBA(imageDataFromData.data, 10)", "getRGBA(imageData.data, 10)");
-setRGBA(imageData.data, 10, testColor);
-shouldBe("getRGBA(imageDataFromData.data, 10)", "getRGBA(imageData.data, 10)");
-
-var data = new Uint8ClampedArray(400);
-data[22] = 129;
-imageDataFromData = new ImageData(data, 20, 5);
-shouldBe("imageDataFromData.width", "20");
-shouldBe("imageDataFromData.height", "5");
-shouldBe("imageDataFromData.data", "data");
-shouldBe("getRGBA(imageDataFromData.data, 2)", "getRGBA(data, 2)");
-setRGBA(imageDataFromData.data, 2, testColor);
-shouldBe("getRGBA(imageDataFromData.data, 2)", "getRGBA(data, 2)");