Reland of: Make Imagebitmap Transferable

third_party/WebKit/LayoutTests/fast/canvas/canvas-ImageBitmap-transferable-expected.txt

+Tests that ImageBitmap is transferable and that the pixel data survives the trip, as well as createImageBitmap(ImageBitmap) works on worker thread
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS bitmapWidth is imageWidth
+PASS bitmapHeight is imageHeight
+PASS bitmapWidth is 0
+PASS bitmapHeight is 0
+PASS bitmapWidth is imageWidth
+PASS bitmapHeight is imageHeight
+PASS newImage.data[0] is within 5 of image.data[0]
+PASS newImage.data[1] is within 5 of image.data[1]
+PASS newImage.data[2] is within 5 of image.data[2]
+PASS newImage.data[3] is image.data[3]
+PASS newImage.data[4] is within 5 of image.data[4]
+PASS newImage.data[5] is within 5 of image.data[5]
+PASS newImage.data[6] is within 5 of image.data[6]
+PASS newImage.data[7] is image.data[7]
+PASS newImage.data[8] is within 5 of image.data[8]
+PASS newImage.data[9] is within 5 of image.data[9]
+PASS newImage.data[10] is within 5 of image.data[10]
+PASS newImage.data[11] is image.data[11]
+PASS newImage.data[12] is within 5 of image.data[12]
+PASS newImage.data[13] is within 5 of image.data[13]
+PASS newImage.data[14] is within 5 of image.data[14]
+PASS newImage.data[15] is image.data[15]
+PASS newImage.data[16] is within 5 of image.data[16]
+PASS newImage.data[17] is within 5 of image.data[17]
+PASS newImage.data[18] is within 5 of image.data[18]
+PASS newImage.data[19] is image.data[19]
+PASS newImage.data[20] is within 5 of image.data[20]
+PASS newImage.data[21] is within 5 of image.data[21]
+PASS newImage.data[22] is within 5 of image.data[22]
+PASS newImage.data[23] is image.data[23]
+PASS successfullyParsed is true
+
+TEST COMPLETE
+