Mark plugins/fullscreen-plugins-dont-reload.html as leaky.

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 22 matching lines @@
 crbug.com/410974 virtual/scroll_customization/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html [ Leak ]
 crbug.com/410974 virtual/scroll_customization/fast/scroll-behavior/scroll-customization/scrollstate-distribute-to-scroll-chain-descendant.html [ Leak ]
 
 # -----------------------------------------------------------------
 # Untriaged but known real leaks.
 # -----------------------------------------------------------------
 
 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 ]
+crbug.com/629058 plugins/fullscreen-plugins-dont-reload.html [ Leak ]
 
 # -----------------------------------------------------------------
 # Untriaged but known leaks which may be false positives.
 # -----------------------------------------------------------------
 
 crbug.com/364417 fast/repaint/japanese-rl-selection-clear.html [ Leak ]
 
 crbug.com/455369 fast/html/marquee-destroyed-without-removed-from-crash.html [ Leak Pass ]
 
 crbug.com/414163 [ Debug ] inspector/sources/debugger/promise-tracker.html [ Crash ]
@@ skipping 45 matching lines @@
 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 ]
 crbug.com/594309 [ Linux ] imported/csswg-test/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-007.html [ Leak ]