[WPT] clip-text-dynamic-2.html is now passing

I believe a patch landed to fix this issue, so the change is expected.

TBR: chrishtr@chromium.org
Bug: 946532
Change-Id: If1d27ee3508ce6ddbf3fad9ca9eaf408c00d1288
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1940508Reviewed-by: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719618}

third_party/blink/web_tests/TestExpectations

@@ -307,8 +307,6 @@ crbug.com/836886 compositing/overflow/scaled-overflow.html [ Failure ]
 # Flaky subpixel AA difference (not necessarily incorrect, but flaky)
 crbug.com/921105 virtual/threaded-no-composited-antialiasing/animations/skew-notsequential-compositor.html [ Failure Pass ]
 
-crbug.com/946532 external/wpt/css/css-backgrounds/background-clip/clip-text-dynamic-2.html [ Failure ]
-
 crbug.com/363609 external/wpt/css/css-transforms/rotateY-180deg-with-overflow-scroll.html [ Failure ]
 crbug.com/954591 external/wpt/css/css-transforms/composited-under-rotateY-180deg.html [ Failure ]
 crbug.com/954591 external/wpt/css/css-transforms/composited-under-rotateY-180deg-clip.html [ Failure ]