Classify 2 extension tests that fail because shared workers can't load extension schemes.

Bug: 839982
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I9a74ae26c42cf2672d382d178da76f22f5758fb2
Reviewed-on: https://chromium-review.googlesource.com/1045555
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556366}

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

@@ -14,8 +14,6 @@
 -EnabledSignInIsolationBrowserTest.SyntheticTrial
 -ExpectCTBrowserTest.TestDynamicExpectCTHeaderProcessing
 -ExpectCTBrowserTest.TestDynamicExpectCTReporting
--ExtensionApiTest.Debugger
--ExtensionApiTestWithSwitch.ExtensionDebugger
 -ExtensionUnloadBrowserTest.UnloadWithContentScripts
 -MediaGalleriesPlatformAppBrowserTest.ToURL
 -NetInternalsTest.netInternalsSessionBandwidthSucceed
@@ -215,6 +213,11 @@
 -ServiceWorkerTestWithNativeBindings/ServiceWorkerTest.WebAccessibleResourcesFetch/0
 -ServiceWorkerTestWithNativeBindings/ServiceWorkerTest.WebAccessibleResourcesIframeSrc/0
 
+# Support URLLoaderFactories from embedder in shared workers.
+# https://crbug.com/839982
+-ExtensionApiTest.Debugger
+-ExtensionApiTestWithSwitch.ExtensionDebugger
+
 # https://crbug.com/832749
 # Add DMServer header
 -ChromeResourceDispatcherHostDelegateBrowserTest.PolicyHeader