Bug 1535814 [wpt PR 15782] - [resource-timing] Add TAO null check tes…

…ts and make sure they pass, a=testonly

Automatic update from web-platform-tests
[resource-timing] Add TAO null check tests and make sure they pass

This CL brings in the pending test [1] for a null TAO check and opaque
origins, adds another test to make sure only case-sensitive "null" is
taken into account, and changes the TAO implementation to actually pass
the tests.

[1] web-platform-tests/wpt#13507

Change-Id: I1656d5a5cf2a833ada4dc83278eda0a07cec66c7

BUG=940898

Change-Id: I1656d5a5cf2a833ada4dc83278eda0a07cec66c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1517653
Commit-Queue: Yoav Weiss <yoavweisschromium.org>
Reviewed-by: Nicolás Peña Moreno <npmchromium.org>
Cr-Commit-Position: refs/heads/master{#641123}

--

wpt-commits: b90e1587455350962c4efc39b7c1bbf588d6ab64
wpt-pr: 15782

UltraBlame original commit: 3d2c191f504c051a25b6d265d1804d9f42d73f62

testing/web-platform/tests/lint.whitelist

@@ -2107,24 +2107,51 @@ timing
 /
 resources
 /
-iframe
+nested
 -
-TAO
-*
+contexts
+.
+js
 SET
 TIMEOUT
 :
 resource
 -
 timing
 /
-resources
+TAO
+-
+null
+-
+opaque
+-
+origin
+.
+sub
+.
+html
+SET
+TIMEOUT
+:
+resource
+-
+timing
 /
-nested
+TAO
 -
-contexts
+case
+-
+insensitive
+-
+null
+-
+opaque
+-
+origin
 .
-js
+sub
+.
+html
 SET
 TIMEOUT
 :