Revert "Disable test that should be using the new API QuitClosure"

This reverts commit 5e0c2251.

Reason for revert: This test will now be fixed as part of re-landing the QuitCurrent*Deprecated() cleanup.

Original change's description:
> Disable test that should be using the new API QuitClosure
> 
> TBR=wez@chromium.org
> NOTRY=True
> 
> Bug: 859151
> Change-Id: Id45c6e679ea50523e99a72cf9ae52a7bd1254286
> Reviewed-on: https://chromium-review.googlesource.com/1121631
> Reviewed-by: Yi Gu <yigu@chromium.org>
> Commit-Queue: Yi Gu <yigu@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#571755}

TBR=wez@chromium.org,yigu@chromium.org

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

Bug: 859151
Change-Id: I94df8df53bc4f58a9c676365db997ab920aa811d
Reviewed-on: https://chromium-review.googlesource.com/1122937Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571977}

chrome/browser/dom_distiller/distillable_page_utils_browsertest.cc

@@ -134,9 +134,8 @@ class DistillablePageUtilsBrowserTestOption : public InProcessBrowserTest {
 using DistillablePageUtilsBrowserTestAlways =
     DistillablePageUtilsBrowserTestOption<kAlwaysTrue>;
 
-// This test should be updated to use QuitClosure. See crbug.com/859151.
 IN_PROC_BROWSER_TEST_F(DistillablePageUtilsBrowserTestAlways,
-                       DISABLED_TestDelegate) {
+                       TestDelegate) {
   for (unsigned i = 0; i < sizeof(kAllPaths) / sizeof(kAllPaths[0]); ++i) {
     testing::InSequence dummy;
     EXPECT_CALL(holder_, OnResult(true, true, _))