Import CSS2 table expectations

There are some tests there that cover parts of the spec
not covered anywhere else.

Change-Id: If853e66c6367da5ec37252177dbb911c7ffd3608
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2408277
Auto-Submit: Aleks Totic <atotic@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Aleks Totic <atotic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806728}

third_party/blink/web_tests/W3CImportExpectations

@@ -73,7 +73,6 @@ external/wpt/css/CSS2/section-index.xht [ Skip ]
 external/wpt/css/CSS2/selector [ Skip ]
 external/wpt/css/CSS2/selectors [ Skip ]
 external/wpt/css/CSS2/syntax [ Skip ]
-external/wpt/css/CSS2/tables [ Skip ]
 external/wpt/css/CSS2/ui [ Skip ]
 external/wpt/css/CSS2/values [ Skip ]
 external/wpt/css/CSS2/visudet [ Skip ]