lacros: Re-enable most ContextMenuBrowserTest tests

Only two fail. The failures are related to multiple profiles, not
context menus in general.

Bug: 1150200
Change-Id: I40c9fa722d3e888d77a31e0155afdaf6c4154369
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622574
Auto-Submit: James Cook <jamescook@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Reviewed-by: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842179}

testing/buildbot/filters/lacros.browser_tests.filter

@@ -48,7 +48,9 @@
 -ContentIndexTest.MetricsCollected
 -ContentSettingsTest.AllowCookiesForASessionUsingExceptions
 -ContentVerifierTest.PolicyCorrupted
--ContextMenuBrowserTest.*
+# https://crbug.com/1150200 - "Open link as" does not appear.
+-ContextMenuBrowserTest.OpenLinkInProfile
+-ContextMenuBrowserTest.OpenLinkInProfileEntryPresent
 -CrComponentsCertificateManagerV3Test.All
 -CrComponentsManagedFootnoteV3Test.All
 -CreativeOriginAdsPageLoadMetricsObserverBrowserTest.CreativeOriginStatusWithThrottlingNestedThrottled