Disable flaky elements-panel-selection-after-delete.js

This test is timing out a lot.

TBR=chenwilliam@chromium.org

Bug: 795542
Change-Id: I8cc41394054c6ba835600ecde5eb0305e222d102
Reviewed-on: https://chromium-review.googlesource.com/831522Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Commit-Queue: Christian Dullweber <dullweber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524676}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3590,6 +3590,7 @@ crbug.com/785662 [ Debug ] http/tests/devtools/sources/debugger-ui/reveal-not-sk
 
 # Flaky DevTools
 crbug.com/667560 http/tests/devtools/elements/elements-panel-rewrite-href.js [ Failure Pass ]
+crbug.com/795542 http/tests/devtools/elements/elements-panel-selection-after-delete.js [ Timeout Pass ]
 
 # Sheriff failures 2017-11-16
 crbug.com/785980 [ Win7 Win10 ] http/tests/devtools/network/network-xhr-same-url-as-main-resource.js [ Failure Pass ]