Disable DevTools test failing with Network Service

http/tests/devtools/sdk/network-interception-wildcard-pattern-matching.js
fails when run with the Network Service enabled. Broken support for
DevTools is a known issue.

TBR=caseq@chromium.org

Bug: 721408
Change-Id: Ibd78cf00220ad1a560a0ea34559dfe9e6a6b58a3
Reviewed-on: https://chromium-review.googlesource.com/721806Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509390}

third_party/WebKit/LayoutTests/FlagExpectations/enable-features=NetworkService

@@ -235,6 +235,7 @@ crbug.com/721408 http/tests/devtools/service-workers/service-workers-navigation-
 crbug.com/721408 http/tests/devtools/service-workers/service-workers-redundant.html [ Timeout ]
 crbug.com/721408 http/tests/devtools/service-workers/service-workers-view.html [ Timeout ]
 crbug.com/721408 http/tests/devtools/console/console-uncaught-promise.html [ Failure ]
+crbug.com/721408 http/tests/devtools/sdk/network-interception-wildcard-pattern-matching.js [ Failure ]
 crbug.com/721408 http/tests/devtools/sources/debugger-async/async-callstack-xhrs.js [ Failure Timeout ]
 Bug(none) http/tests/loading/307-after-303-after-post.html [ Failure ]
 Bug(none) http/tests/loading/doc-write-sync-third-party-script-reload.html [ Crash ]