Revert of Add leak expectation for media/remoteplayback/prompt-twice-throws.html

third_party/WebKit/LayoutTests/LeakExpectations

 # This file is used for tests that only need to be suppressed on the Chromium
 # WebKit Leak bots.
 
 ###########################################################################
 # WARNING: Memory leaks must be fixed asap. Sheriff is expected to revert #
 # culprit CLs instead of suppressing the leaks. If you have any question, #
 # ask hajimehoshi@.                                                       #
 ###########################################################################
 
 # view-source:// tests are not supported by the leak detector
@@ skipping 80 matching lines @@
 crbug.com/506754 virtual/service-worker-navigation-preload/http/tests/serviceworker/chromium/window-close-during-registration.html [ Leak ]
 
 # -----------------------------------------------------------------
 # Untriaged but known leaks of ActiveDOMObject (Web Audio).
 # -----------------------------------------------------------------
 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/668479 [ Linux ] media/remoteplayback/prompt-twice-throws.html [ Leak ]
 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/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-align-self-baseline-vert-001.html [ Failure Pass Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-empty-001a.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-empty-001b.html [ Leak ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-multi-item-vert-001.html [ Leak ]
 crbug.com/594309 [ 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 ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-007.html [ Leak ]
 
 crbug.com/664874 http/tests/xmlhttprequest/workers/xmlhttprequest-allowed-with-disabled-web-security.html [ Leak ]
 crbug.com/664874 virtual/mojo-loading/http/tests/xmlhttprequest/workers/xmlhttprequest-allowed-with-disabled-web-security.html [ Leak ]
 
 ###########################################################################
 # WARNING: Memory leaks must be fixed asap. Sheriff is expected to revert #
 # culprit CLs instead of suppressing the leaks. If you have any question, #
 # ask hajimehoshi@.                                                       #
 ###########################################################################