Remove a few tests that now run successfully.

BUG=575230

Review-Url: https://codereview.chromium.org/2477063003
Cr-Commit-Position: refs/heads/master@{#430302}

testing/buildbot/filters/browser-side-navigation.linux.browser_tests.filter

@@ -10,17 +10,7 @@
 -TabManagerTest.TabManagerBasics
 -TemplateURLScraperTest.ScrapeWithOnSubmit
 -ThreatDOMDetailsTest.Everything
--WebNavigationApiTest.Crash
--WebNavigationApiTest.CrossProcess
--WebNavigationApiTest.CrossProcessAbort
--WebNavigationApiTest.CrossProcessFragment
--WebNavigationApiTest.CrossProcessHistory
--WebNavigationApiTest.CrossProcessIframe
--WebNavigationApiTest.Failures
--WebNavigationApiTest.IFrame
--WebNavigationApiTest.OpenTab
 -WebNavigationApiTest.RequestOpenTab
--WebNavigationApiTest.SrcDoc
 -WebNavigationApiTest.UserAction
 
 # Errors related to forms submission.
@@ -30,4 +20,4 @@
 # https://crbug.com/652767: NavigationHandle::GetResponseHeaders sometimes
 # returns null for browser-side navigations
 -PageLoadMetricsBrowserTest.Ignore204Pages
--PageLoadMetricsBrowserTest.IgnoreDownloads
\ No newline at end of file
+-PageLoadMetricsBrowserTest.IgnoreDownloads