LeakExpectations: add more service worker tests

TBR=haraken
BUG=364377
NOTRY=true

Review URL: https://codereview.chromium.org/359963003

git-svn-id: svn://svn.chromium.org/blink/trunk@177181 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/LeakExpectations

@@ -121,6 +121,7 @@ crbug.com/364390 http/tests/serviceworker/controller-on-load.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/controller-on-reload.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/fetch-event.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/headermap.html [ Leak ]
+crbug.com/364390 http/tests/serviceworker/headers.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/indexeddb.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/interfaces.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/postmessage-msgport-to-client.html [ Leak ]
@@ -137,6 +138,7 @@ crbug.com/364390 http/tests/serviceworker/service-worker-gc.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/serviceworkerglobalscope-scope.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/serviceworkerobject-scope.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/state.html [ Leak ]
+crbug.com/364390 http/tests/serviceworker/unregister-controller.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/unregister.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/waiting.html [ Leak ]
 crbug.com/364390 http/tests/serviceworker/window-close-during-registration.html [ Leak ]