Remove nonstandard 'endings' option for Blob/File constructor

third_party/WebKit/LayoutTests/http/tests/local/blob/send-data-blob-expected.txt

 CONSOLE WARNING: line 17: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
 Test for building blobs with multiple strings combined by BlobBuilder and sending them via XMLHttpRequest.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
 * BlobBuilder.append(string)
 PASS Expected response data received: OK
 PASS Expected response data received: OK
 PASS 'type/foo' is 'type/foo'
 PASS Expected response data received: OK
 * BlobBuilder.append(blob)
 PASS Expected response data received: OK
 PASS Expected response data received: OK
 PASS 'type/bar' is 'type/bar'
 PASS Expected response data received: OK
 * BlobBuilder.append(string/blob)
 PASS Expected response data received: OK
 PASS Expected response data received: OK
 * BlobBuilder.append(string/blob) - with recycled blob
 PASS Expected response data received: OK
 * BlobBuilder.append(string) - with line-endings
 PASS Expected response data received: OK
 PASS Expected response data received: OK
 PASS Expected response data received: OK
-* BlobBuilder.append(string, "native") - with line-endings
-PASS Expected response data received: OK
-PASS Expected response data received: OK
-PASS Expected response data received: OK
-PASS Expected response data received: OK
 PASS successfullyParsed is true
 
 TEST COMPLETE