Re-enabled committed interstitial tests for MixedContentSettings

Couldn't reproduce the flakiness in those tests, so re-enabling with
committed interstitials, will revert this CL if the flakiness returns.
Also: This tests seem to be flaky in general, even without committed
interstitials, e.g., crbug.com/874959

Bug: 863272
Change-Id: I64b5291513041e4dd9da9fa6125785fe4727a6c7
Reviewed-on: https://chromium-review.googlesource.com/1178928
Commit-Queue: Carlos IL <carlosil@chromium.org>
Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585270}

chrome/browser/ssl/ssl_browsertest.cc

@@ -3899,10 +3899,6 @@ IN_PROC_BROWSER_TEST_P(SSLUIWorkerFetchTest,
 // This test checks the behavior of mixed content blocking for the requests
 // from a dedicated worker by changing the settings in WebPreferences.
 IN_PROC_BROWSER_TEST_P(SSLUIWorkerFetchTest, MAYBE_MixedContentSettings) {
-  // TODO(carlosil): Reenable tests once confirmed not flaky for committed
-  // interstitials.
-  if (AreCommittedInterstitialsEnabled())
-    return;
   ChromeContentBrowserClientForMixedContentTest browser_client;
   content::ContentBrowserClient* old_browser_client =
       content::SetBrowserClientForTesting(&browser_client);
@@ -3979,10 +3975,6 @@ IN_PROC_BROWSER_TEST_P(SSLUIWorkerFetchTest, MAYBE_MixedContentSettings) {
 // block-all-mixed-content CSP is set.
 IN_PROC_BROWSER_TEST_P(SSLUIWorkerFetchTest,
                        MAYBE_MixedContentSettingsWithBlockingCSP) {
-  // TODO(carlosil): Reenable tests once confirmed not flaky for committed
-  // interstitials.
-  if (AreCommittedInterstitialsEnabled())
-    return;
   ChromeContentBrowserClientForMixedContentTest browser_client;
   content::ContentBrowserClient* old_browser_client =
       content::SetBrowserClientForTesting(&browser_client);