Removed test case having scrollbar issues on Mac.

Removed test case having scrollbar issues on Mac.

For some reason the generated scrollbar pseudo element count was different
on Mac, although the test passed on the Mac bot when landing. I've removed
the test for :single-button/:double-button as the test coverage by the
other pseudo classes should be enough.

R=leviw@chromium.org
BUG=427953
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185036

[leviw_travelin_and_unemployed, 2014-11-05 23:32:02]

The CQ bit was checked by leviw@chromium.org

[leviw_travelin_and_unemployed, 2014-11-05 23:32:03]

LGTM.

[commit-bot: I haz the power, 2014-11-05 23:32:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/687943002/1

[commit-bot: I haz the power, 2014-11-05 23:32:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-11-05 23:32:47]

Failed to apply patch for LayoutTests/TestExpectations:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file LayoutTests/TestExpectations
  Hunk #1 FAILED at 51.
  1 out of 1 hunk FAILED -- saving rejects to file
LayoutTests/TestExpectations.rej

Patch:       LayoutTests/TestExpectations
Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index
b07e5a1168dc6abcba0b43e5524a5a5c61552700..6259b0c70403670b50bcc8bbcabe3d47e6ffa8ff
100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -51,8 +51,6 @@ crbug.com/321460 animations/animation-direction-normal.html [
Pass ImageOnlyFail
 
 crbug.com/328996 [ Mac Debug ] http/tests/media/video-seek-to-middle.html [
Pass Failure ]
 
-crbug.com/427953 [ Mac ] fast/css/invalidation/scrollbar-pseudo-classes.html [
ImageOnlyFailure ]
-
 # This test is slow due to Mesa slowness.
 crbug.com/244481 virtual/gpu/canvas/philip/tests/2d.shadow.blur.low.html [ Skip
]

[rune, 2014-11-10 12:46:52]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2014-11-10 12:47:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/687943002/20001

[commit-bot: I haz the power, 2014-11-10 13:51:44]

Committed patchset #2 (id:20001) as 185036