Rebaseline of validation-bubble-appearance-wrap.html for macOS 10.10

The screen size flakiness should have been resolved by
crrev.com/704235.

Bug: 977153
Tbr: wangxianzhu@chromium.org
Change-Id: I81a3c2acde46c4a0dfd8a58f78a85b95beab5c03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1852329Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704575}

third_party/blink/web_tests/TestExpectations

@@ -5699,7 +5699,6 @@ crbug.com/937546 [ Win7 ] http/tests/security/xss-DENIED-cross-origin-stack-over
 # Sheriff 2019-06-14
 
 # Sheriff 2019-06-20
-crbug.com/977153 [ Mac ] fast/forms/validation-bubble-appearance-wrap.html [ Pass Failure ]
 crbug.com/976045 fast/scrolling/unscrollable-layer-subpixel-size-with-negative-overflow.html [ Pass Failure ]
 crbug.com/976045 virtual/scroll_customization/fast/scrolling/unscrollable-layer-subpixel-size-with-negative-overflow.html [ Pass Failure ]
 crbug.com/976045 virtual/threaded/fast/scrolling/unscrollable-layer-subpixel-size-with-negative-overflow.html [ Pass Failure ]