bfcache: Update tests filters.

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Test : WebContentsSplitCacheBrowserTestEnabled.SplitCacheDedicatedWorkerScripts/1
       WebContentsSplitCacheBrowserTestEnabled.SplitCacheDedicatedWorkerScripts/0
Test added recently (2019-08-09) by:
https://chromium-review.googlesource.com/c/chromium/src/+/1713061
See  https://crbug.com/992891

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Test : SystemNetworkContextManagerMaxConnectionsPerProxyBrowsertest.MaxConnectionsPerProxy

Test added recently (2019-08-08) by:
https://chromium-review.googlesource.com/c/chromium/src/+/1738342

The test is flaky and I can't make it fail locally.

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Test : ExtensionCrxInstallerTest.InstallDelayedUntilNextUpdate
Bug  : None. Extensions aren't supported by the BackForwardCache at all yet.

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TBR: ahemery@chromium.org
Bug: 990354, 991488, 992891
Change-Id: I4173dfb57dd15b815193cfc8d2e1218c2bc6eeba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1749087
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685982}

testing/buildbot/filters/bfcache.browser_tests.filter

@@ -44,3 +44,11 @@
 -TabManagerTest.TabFreezeAndMakeVisible
 -TabManagerTest.TabFreezeAndUnfreeze
 -TabManagerTest.TabFreezeAndUrgentDiscard
+
+# An extension is non-idle because its option page is opened. When it is
+# navigated to about:blank, it should become idle again. This doesn't happen
+# with the BackForwardCache, because the old page is still there.
+-ExtensionCrxInstallerTest.InstallDelayedUntilNextUpdate
+
+# Very flaky. Can't reproduce locally, it always succeed.
+-SystemNetworkContextManagerMaxConnectionsPerProxyBrowsertest.MaxConnectionsPerProxy

testing/buildbot/filters/bfcache.content_browsertests.filter

@@ -128,3 +128,9 @@
 # A frozen page failed to execute Javascript.
 # See https://crbug.com/991194
 -WebContentsImplBrowserTest.SetPageFrozen
+
+# Check failed: popup_ || pepper_fullscreen_ in RenderWidget::OnClose()
+# https://crbug.com/992891
+-WebContentsSplitCacheBrowserTestEnabled.SplitCacheDedicatedWorkerScripts/1
+-WebContentsSplitCacheBrowserTestEnabled.SplitCacheDedicatedWorkerScripts/0
+