I'm reluctant to revert the patch as it looks like it was really difficult to land. Looks like it might be some rebasing issue going on, but I couldn't reproduce the issue locally on Linux. I'm going to disable this test instead.

cc'ing beccahughes who wrote the test.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9e3e507a9998868cf17f4ad0d0d224a917db692e

commit 9e3e507a9998868cf17f4ad0d0d224a917db692e
Author: Darren Shen <shend@chromium.org>
Date: Thu Apr 05 09:07:26 2018

Disable test doubletap-to-jump-forwards-too-short on WebKit trusty debug

Likely failing due to incorrect rebaselining from:
https://chromium.googlesource.com/chromium/src/+/7a8765a7a7e0158e7f82681d06ce798bf8901328

TBR=beccahughes@chromium.org
TBR=thomasanderson@chromium.org

Bug:  829228 
Change-Id: Icf2894aae0a4c0ed3baa85d82f7dd47417410d23
Reviewed-on: https://chromium-review.googlesource.com/997197
Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548371}
[modify] https://crrev.com/9e3e507a9998868cf17f4ad0d0d224a917db692e/third_party/WebKit/LayoutTests/TestExpectations

 Issue 829282  has been merged into this issue.

 Issue 829357  has been merged into this issue.

 Issue 828562  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/341f9b7e7a76b4453db17e51128de0471280d0e8

commit 341f9b7e7a76b4453db17e51128de0471280d0e8
Author: Mikel Astiz <mastiz@chromium.org>
Date: Thu Apr 05 15:33:59 2018

Disable test doubletap-to-jump-forwards-too-short on Linux

Follow-up to https://chromium-review.googlesource.com/997197 where,
presumably, the wrong test was disabled.

TBR=beccahughes@chromium.org
TBR=thomasanderson@chromium.org

Bug:  829228 
Change-Id: Icd680733174a87d05172fe842b0dc0eed46aa80d
Reviewed-on: https://chromium-review.googlesource.com/997745
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548429}
[modify] https://crrev.com/341f9b7e7a76b4453db17e51128de0471280d0e8/third_party/WebKit/LayoutTests/TestExpectations

Failing on Win7 as well.
Example: https://ci.chromium.org/buildbot/chromium.webkit/WebKit%20Win7/62491

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9e405e24c682904c03fcf620c388fb004b60ec0b

commit 9e405e24c682904c03fcf620c388fb004b60ec0b
Author: Takumi Fujimoto <takumif@chromium.org>
Date: Thu Apr 05 18:40:06 2018

Disable test doubletap-to-jump-forwards-too-short on Win7

The test is failing on Win7 Tests (dbg)(1) and WebKit Win7 as well.

TBR=beccahughes@chromium.org
TBR=thomasanderson@chromium.org

No-Try: true
No-Presubmit: true
No-Tree-Checks: true

Bug:  829228 
Change-Id: I676a6d19c2f35a3acd8fc701b409fc8c2fb4ba20
Reviewed-on: https://chromium-review.googlesource.com/998332
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548500}
[modify] https://crrev.com/9e405e24c682904c03fcf620c388fb004b60ec0b/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/817c8546dc71980944aead4a97e301d70869c71d

commit 817c8546dc71980944aead4a97e301d70869c71d
Author: Darren Shen <shend@chromium.org>
Date: Thu Apr 05 23:13:05 2018

Revert "Disable test doubletap-to-jump-forwards-too-short on WebKit trusty debug"

This reverts commit 9e3e507a9998868cf17f4ad0d0d224a917db692e.

Reason for revert: Disabled wrong test.

Original change's description:
> Disable test doubletap-to-jump-forwards-too-short on WebKit trusty debug
>
> Likely failing due to incorrect rebaselining from:
> https://chromium.googlesource.com/chromium/src/+/7a8765a7a7e0158e7f82681d06ce798bf8901328
>
> TBR=beccahughes@chromium.org
> TBR=thomasanderson@chromium.org
>
> Bug:  829228 
> Change-Id: Icf2894aae0a4c0ed3baa85d82f7dd47417410d23
> Reviewed-on: https://chromium-review.googlesource.com/997197
> Reviewed-by: Darren Shen <shend@chromium.org>
> Commit-Queue: Darren Shen <shend@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#548371}

TBR=thomasanderson@chromium.org,shend@chromium.org,beccahughes@chromium.org

Change-Id: I4000d62b9e4802214eabd139d62027d9e5664c50
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  829228 
Reviewed-on: https://chromium-review.googlesource.com/999073
Commit-Queue: Darren Shen <shend@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548606}
[modify] https://crrev.com/817c8546dc71980944aead4a97e301d70869c71d/third_party/WebKit/LayoutTests/TestExpectations

Bot appears to have recovered, removing from sheriff queue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a8c418d76f58828b7c496b7cedc97d3279e6a387

commit a8c418d76f58828b7c496b7cedc97d3279e6a387
Author: Tom Anderson <thomasanderson@chromium.org>
Date: Fri Apr 06 17:11:51 2018

Reenable and rebaseline layout tests after r548309

BUG= 787020 , 829228 
TBR=eae

Change-Id: If6bffd3778b2bee8749fa3b1f77a0affd599d1ba
Reviewed-on: https://chromium-review.googlesource.com/998133
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548825}
[modify] https://crrev.com/a8c418d76f58828b7c496b7cedc97d3279e6a387/third_party/WebKit/LayoutTests/TestExpectations
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/linux/virtual/modern-media-controls/media/controls/modern/doubletap-to-jump-forwards-too-short-expected.txt
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/mac-mac10.10/external/wpt/service-workers/service-worker/ServiceWorkerGlobalScope/extendable-message-event.https-expected.txt
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/mac-mac10.10/external/wpt/shadow-dom/untriaged/events/retargeting-focus-events/test-003-expected.txt
[rename] https://crrev.com/a8c418d76f58828b7c496b7cedc97d3279e6a387/third_party/WebKit/LayoutTests/platform/mac-mac10.12/virtual/layout_ng/fast/block/basic/014-expected.png
[rename] https://crrev.com/a8c418d76f58828b7c496b7cedc97d3279e6a387/third_party/WebKit/LayoutTests/platform/mac-mac10.12/virtual/threaded/printing/tfoot-repeats-at-bottom-of-each-page-multiple-tables-expected.png
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/mac-retina/external/wpt/service-workers/service-worker/ServiceWorkerGlobalScope/extendable-message-event.https-expected.txt
[rename] https://crrev.com/a8c418d76f58828b7c496b7cedc97d3279e6a387/third_party/WebKit/LayoutTests/platform/win/virtual/gpu/fast/canvas/canvas-zero-length-lineCap-expected.png
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/win/virtual/layout_ng/fast/block/basic/014-expected.png
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/win/virtual/threaded/printing/tfoot-repeats-at-bottom-of-each-page-multiple-tables-expected.png
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/win7/virtual/modern-media-controls/media/controls/modern/doubletap-to-jump-forwards-too-short-expected.txt
[delete] https://crrev.com/0dd7412668ce4dc71a063a6657e8cba460b1a377/third_party/WebKit/LayoutTests/platform/win7/virtual/threaded/http/tests/devtools/tracing/timeline-js/compile-script-expected.txt