Devtools: re-enable editor ctrl-D test

This test is now no longer flaky/failing locally on my machine. I'm
attempting to re-enable in the CI system.

Bug: 849284

Change-Id: I74809701307005ac90d047627b72e66b0abb19b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2605395Reviewed-by: Robert Paveza <Rob.Paveza@microsoft.com>
Commit-Queue: Brandon Goddard <brgoddar@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#839495}

third_party/blink/web_tests/TestExpectations

@@ -4744,7 +4744,6 @@ crbug.com/933880 http/tests/inspector-protocol/network/xhr-interception-auth-fai
 # because content_shell does not add the about: handler. With network service
 # enabled this fails in both content_shell and chrome.
 crbug.com/933880 http/tests/misc/redirect-to-about-blank.html [ Failure Timeout ]
-crbug.com/849284 [ Win ] http/tests/devtools/editor/text-editor-ctrl-d-2.js [ Failure Timeout ]
 
 # Sheriff 2019-02-22
 crbug.com/934636 http/tests/security/cross-origin-indexeddb-allowed.html [ Crash Pass ]