DevTools: reenable tests

Corresponded V8 change was rolled to Chromium.

TBR=pfeldman@chromium.org

Bug: v8:8200
Change-Id: If887514a6baa6fb293a8ed600a2ca0477debbcb7
Reviewed-on: https://chromium-review.googlesource.com/1246365Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594465}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3136,9 +3136,6 @@ crbug.com/846472 virtual/video-surface-layer/external/wpt/feature-policy/feature
 crbug.com/829921 external/wpt/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html [ Pass Timeout ]
 crbug.com/626703 external/wpt/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html [ Pass Timeout ]
 
-crbug.com/v8/8200 inspector-protocol/debugger/debugger-scope-skip-variables-with-empty-name.js [ Skip ]
-crbug.com/v8/8200 inspector-protocol/runtime/runtime-getProperties.js [ Skip ]
-
 crbug.com/626703 external/wpt/css/cssom-view/scroll-behavior-smooth.html [ Timeout ]
 crbug.com/626703 external/wpt/service-workers/service-worker/fetch-event-is-reload-navigation-manual.https.html [ Skip ]
 crbug.com/626703 virtual/service-worker-servicification/external/wpt/service-workers/service-worker/fetch-event-is-reload-navigation-manual.https.html [ Skip ]