Update network service test filter

TBR=yzshen@chromium.org
NOTRY=true

Bug: 781565, 752370
Change-Id: Ic14467588e28081173625323dea6dd5dd99a4f0e
Reviewed-on: https://chromium-review.googlesource.com/764811Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515846}

testing/buildbot/filters/mojo.fyi.network_browser_tests.filter

@@ -965,3 +965,13 @@
 -PrerenderBrowserTest.PrerenderSSLClientCertSubresource
 -PrerenderBrowserTest.PrerenderSSLClientCertTopLevel
 -SSLUITestWithClientCert.TestWSSClientCert
+
+# Started failing after r515789
+-SSLUITestCommittedInterstitials.ProceedLinkOverridable
+
+# TODO(jam): investigate
+-SBNavigationObserverBrowserTest.DownloadViaHTML5FileApiWithoutUserGesture
+-SBNavigationObserverBrowserTest.DownloadViaHTML5FileApiWithUserGesture
+
+# TODO(xingliu): broke in r515816
+-DownloadTest.CloseNewTab4

third_party/WebKit/LayoutTests/FlagExpectations/enable-features=NetworkService

@@ -221,3 +221,7 @@ crbug.com/778721 http/tests/fetch/workers/thorough/redirect-nocors-other-https.h
 crbug.com/778721 http/tests/fetch/workers/thorough/redirect-password-other-https.html [ Pass Failure ]
 crbug.com/778721 http/tests/fetch/workers/thorough/redirect-password.html [ Pass Failure ]
 crbug.com/778721 http/tests/fetch/workers/thorough/scheme-blob.html [ Pass Failure ]
+
+# broke in r515816
+Bug(none) fast/dom/HTMLAnchorElement/anchor-download.html [ Timeout ]
+Bug(none) fast/dom/HTMLAnchorElement/anchor-nodownload-set.html [ Timeout ]