Sync LeakExpectations.

third_party/WebKit/LayoutTests/LeakExpectations

 # This file is used for tests that only need to be suppressed on the Chromium
 # WebKit Leak bots.
 #
 # This list isn't comprehensive yet, and Leak Detector bots are not tree closers atm.
 # Gardeners are welcome to touch this file, but you can ignore the failures
 # and wait for kouhei@ or hajimehoshi@ to maintain this file.
 
 # view-source:// tests are not supported by the leak detector
 crbug.com/364398 fast/frames/viewsource/viewsource-1.html [ Leak ]
 crbug.com/364398 fast/frames/viewsource/viewsource-2.html [ Leak ]
@@ skipping 106 matching lines @@
 crbug.com/506754 http/tests/cachestorage/window/cache-put.html [ Leak ]
 crbug.com/506754 http/tests/inspector/network/network-xhr-replay.html [ Leak ]
 crbug.com/506754 http/tests/inspector/service-workers/service-worker-agents.html [ Crash Leak ]
 crbug.com/506754 http/tests/security/cross-origin-indexeddb-allowed.html [ Leak ]
 crbug.com/506754 http/tests/serviceworker/chromium/resolve-after-window-close.html [ Leak ]
 crbug.com/506754 http/tests/serviceworker/chromium/window-close-during-registration.html [ Leak ]
 
 # -----------------------------------------------------------------
 # Untriaged but known leaks of ActiveDOMObject (Web Audio).
 # -----------------------------------------------------------------
-crbug.com/506757 webaudio/mediastreamaudiodestinationnode.html [ Leak ]
-
-crbug.com/538524 editing/selection/modify-crash.html [ Leak ]
-crbug.com/546132 editing/execCommand/insert-html-to-document-element-crash.html [ Leak ]
-
 crbug.com/451577 [ Linux ] inspector/elements/user-properties.html [ Slow ]
 crbug.com/451577 [ Linux ] inspector/extensions/extensions-reload.html [ Slow ]
 crbug.com/451577 [ Linux ] inspector/extensions/extensions-sidebar.html [ Slow ]
 
 crbug.com/578297 [ Linux ] media/video-autoplay-experiment-modes.html [ Slow ]
 crbug.com/578297 [ Linux ] virtual/threaded/printing/webgl-oversized-printing.html [ Slow ]
 crbug.com/578297 [ Linux ] http/tests/media/media-source/mediasource-appendstream-quota-exceeded.html [ Slow ]
 
 # -----------------------------------------------------------------
 # Leaks in imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/*
 # -----------------------------------------------------------------
 crbug.com/594603 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-align-self-baseline-vert-001.html [ Leak ]
 crbug.com/594603 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-empty-001a.html [ Leak ]
 crbug.com/594603 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-empty-001b.html [ Leak ]
 crbug.com/594603 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-multi-item-vert-001.html [ Leak ]
 crbug.com/594603 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-whitespace-handling-002.xhtml [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-declaration-15.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-declaration-16.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-declaration-17.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-declaration-18.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-external-font-face-01.html [ Pass Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/variables/variable-font-face-02.html [ Pass Leak ]