Revert "Reland "Disable WelcomeScreenBrowserTest.WelcomeScreenNext.""

This reverts commit 0e80dc08.

Reason for revert: The issue should've been fixed with CL:1868769

Original change's description:
> Reland "Disable WelcomeScreenBrowserTest.WelcomeScreenNext."
> 
> This reverts commit 60f3e975.
> 
> Reason for revert:
> WelcomeScreenBrowserTest.WelcomeScreenNext is still flaky on ChromeOS,
> https://analysis.chromium.org/p/chromium/flake-portal/flakes/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyTAsSBUZsYWtlIkFjaHJvbWl1bUBicm93c2VyX3Rlc3RzQFdlbGNvbWVTY3JlZW5Ccm93c2VyVGVzdC5XZWxjb21lU2NyZWVuTmV4dAw
> 
> Original change's description:
> > Revert "Disable WelcomeScreenBrowserTest.WelcomeScreenNext."
> > 
> > This reverts commit 2aa5da39.
> > 
> > Reason for revert: reenabling given crrev.com/1864618
> > 
> > Original change's description:
> > > Disable WelcomeScreenBrowserTest.WelcomeScreenNext.
> > > 
> > > Bug: 1014952
> > > Change-Id: I1df1941c2a0a92d243cb4e4624ae920b150c7694
> > > Tbr: achuith@chromium.org
> > > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865351
> > > Reviewed-by: John Budorick <jbudorick@chromium.org>
> > > Commit-Queue: John Budorick <jbudorick@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#706500}
> > 
> > TBR=achuith@chromium.org,jbudorick@chromium.org
> > 
> > Change-Id: I86cba6fe329f52b5bdcd7b07d04d1dfb40fa65cf
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: 1014952
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866407
> > Reviewed-by: John Budorick <jbudorick@chromium.org>
> > Commit-Queue: John Budorick <jbudorick@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#706891}
> 
> TBR=achuith@chromium.org,jbudorick@chromium.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: 1014952
> Change-Id: I57bebd90ee517d2c2d729fc91dcef9667ea3ebe0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1869073
> Reviewed-by: Lan Wei <lanwei@chromium.org>
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Commit-Queue: Lan Wei <lanwei@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#707486}

TBR=achuith@chromium.org,lanwei@chromium.org,jbudorick@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1014952
Change-Id: I1684b0b73c3b4a16ff154906b148b96ed7d35ba9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1872582Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708116}

chrome/browser/chromeos/login/screens/welcome_screen_browsertest.cc

@@ -196,8 +196,7 @@ IN_PROC_BROWSER_TEST_F(WelcomeScreenBrowserTest, WelcomeScreenElements) {
       {"connect", "welcomeScreen", "enableDebuggingLink"});
 }
 
-// Flaky: crbug.com/1014952
-IN_PROC_BROWSER_TEST_F(WelcomeScreenBrowserTest, DISABLED_WelcomeScreenNext) {
+IN_PROC_BROWSER_TEST_F(WelcomeScreenBrowserTest, WelcomeScreenNext) {
   welcome_screen_->Show();
   OobeScreenWaiter(WelcomeView::kScreenId).Wait();
   test::OobeJS().TapOnPath({"connect", "welcomeScreen", "welcomeNextButton"});