Implement Blob.close().

LayoutTests/fast/files/blob-close-revoke-expected.txt

Index: LayoutTests/fast/files/blob-close-revoke-expected.txt
diff --git a/LayoutTests/fast/files/blob-close-revoke-expected.txt b/LayoutTests/fast/files/blob-close-revoke-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1f36aea80af2849eb16b9de8e520a15dfb2d22b8
--- /dev/null
+++ b/LayoutTests/fast/files/blob-close-revoke-expected.txt
@@ -0,0 +1,25 @@
+Test the Blob.close() method, revoking.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+Test that dereferencing URLs referring to closed Blobs fail.
+PASS Error triggered on loading image from closed Blob.
+Test that dereferencing URLs referring to closed Blobs fail, workers.
+PASS Worker loaded.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+PASS Error triggered on starting Worker from a closed Blob.
+Test creating object URLs on closed Blobs
+PASS blobURL1 !== blobURL2 is true
+PASS blobURL2.length > 0 is true
+PASS successfullyParsed is true
+
+TEST COMPLETE
+