[webnfc] Fix a bug for mock nfc impl

In js, "enum_value ? x : y;" will get y if enum_value is 0, but x is
what we actually want to get in such a case. The correct code should
be "enum_value != null ? x : y".

BUG=520391

Change-Id: Ibe3771d0dc0ece3cd6659aec298306f694a8f0e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2037106
Commit-Queue: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Reviewed-by: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Cr-Commit-Position: refs/heads/master@{#739339}

third_party/blink/web_tests/external/wpt/resources/chromium/nfc-mock.js

@@ -132,7 +132,7 @@ function matchesWatchOptions(message, options) {
 
 function createNDEFError(type) {
   return {
-    error: type ?
+    error: type != null ?
         new device.mojom.NDEFError({errorType: type, errorMessage: ''}) :
         null
   };

third_party/blink/web_tests/external/wpt/web-nfc/NDEFWriter_write.https-expected.txt

-This is a testharness.js-based test.
-PASS Test that promise is rejected with TypeError if NDEFMessageSource is invalid.
-PASS Test that promise is rejected with SyntaxError if NDEFMessageSource contains invalid records.
-PASS NDEFWriter.write should fail if user permission is not granted.
-PASS NDEFWriter.write should fail if no implementation for NFC Mojo interface is available.
-PASS NDEFWriter.write should fail if abort write request before write happends.
-PASS NDEFWriter.write should fail if signal's aborted flag is set.
-PASS NDEFWriter.write should fail if signal is not an AbortSignal.
-PASS Synchronously signaled abort.
-PASS NDEFWriter.write should fail when NFC HW is disabled.
-PASS NDEFWriter.write should fail when NFC HW is not supported.
-PASS Test that WebNFC API is not accessible from iframe context.
-PASS NDEFWriter.write should succeed when NFC HW is enabled
-PASS NDEFWriter.write NDEFMessage containing text, mime, unknown, url, absolute-url and external records with default NDEFWriteOptions.
-PASS NDEFWriter.write NDEFMessage containing embedded records.
-PASS Test that NDEFWriter.write succeeds when message is DOMString.
-PASS Test that NDEFWriter.write succeeds when message is ArrayBuffer.
-PASS Test that NDEFWriter.write succeeds when message is ArrayBufferView.
-PASS NDEFWriter.write with 'empty' record should succeed.
-PASS Check that default NDEFWriteOptions values are correctly set.
-PASS Check that provided NDEFWriteOptions values are correctly converted.
-PASS NDEFWriter.write should read data when ignoreRead is false.
-PASS NDEFWriter.write should ignore reading data when ignoreRead is true.
-PASS NDEFWriter.write should replace all previously configured write operations.
-PASS Test that mediaType should be set to 'application/octet-stream' if NDEFRecordInit.record's recordType is 'mime' and NDEFRecordInit.record's mediaType is undefined.
-PASS NDEFWriter.write should fail when the NFC device coming up does not expose NDEF technology.
-PASS NDEFWriter.write should succeed to write data to an unformatted NFC device when the NDEFWriteOptions.overwrite is false.
-PASS NDEFWriter.write should succeed to overwrite the existing data when the NDEFWriteOptions.overwrite is true.
-FAIL NDEFWriter.write should fail when there are NDEF records on the NFC device and NDEFWriteOptions.overwrite is false. assert_unreached: Should have rejected: undefined Reached unreachable code
-PASS NDEFWriter.write should fail with NetworkError when NFC data transfer fails.
-Harness: the test ran to completion.
-