Remove dangling LeakExpectations pointers.

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 30 matching lines @@
 # -----------------------------------------------------------------
 
 crbug.com/327574 permissionclient/image-permissions.html [ Leak ]
 crbug.com/327574 http/tests/permissionclient/image-permissions.html [ Leak ]
 crbug.com/327574 fast/loader/data-images-with-images-disabled.html [ Leak ]
 
 # -----------------------------------------------------------------
 # Untriaged but known leaks which may be false positives.
 # -----------------------------------------------------------------
 
-crbug.com/364411 fast/frames/location-observe-callback-crash.html [ Leak ]
-
 crbug.com/364417 editing/selection/selection-in-iframe-removed-crash.html [ Leak ]
 crbug.com/364417 editing/selection/user-select-js-property.html [ Leak ]
 crbug.com/364417 fast/events/touch/gesture/context-menu-on-long-tap.html [ Leak ]
 crbug.com/364417 fast/repaint/japanese-rl-selection-clear.html [ Leak ]
-crbug.com/364417 virtual/spv2/fast/repaint/japanese-rl-selection-clear.html [ Leak ]
 crbug.com/364417 fast/text/international/hebrew-selection.html [ Leak ]
 
 crbug.com/455369 fast/html/marquee-destroyed-without-removed-from-crash.html [ Leak Pass ]
 
 crbug.com/366042 fast/history/history-traversal-is-asynchronous.html [ Leak ]
 
 crbug.com/364391 http/tests/misc/acid3.html [ Leak Pass ]
 
 # Resource leak
 crbug.com/403987 fast/dom/element-attribute-js-null.html [ Leak ]
@@ skipping 40 matching lines @@
 # The leak detector's result for ActiveDOMObject (especially IndexedDB) is
 # flaky and we need to fix the leak detector (crbug.com/507224). Until then,
 # the tests for IndexedDB are skipped.
 crbug.com/506752 imported/web-platform-tests/IndexedDB/ [ Skip ]
 crbug.com/506752 storage/indexeddb/ [ Skip ]
 
 # -----------------------------------------------------------------
 # Untriaged but known leaks of ActiveDOMObject (http).
 # -----------------------------------------------------------------
 crbug.com/506754 http/tests/cachestorage/window/cache-put.html [ Leak ]
-crbug.com/506754 http/tests/inspector/filesystem/request-file-content.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 (inspector).
 # -----------------------------------------------------------------
 crbug.com/506756 inspector/console/console-log-side-effects.html [ Leak ]
 crbug.com/506756 inspector/console/only-one-deprecation-warning.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 ]