Gardening: add Leak expectations for a few tests

imported/web-platform-tests/shadow-dom/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-004.html
imported/web-platform-tests/shadow-dom/user-interaction/ranges-and-selections/test-001.html
imported/web-platform-tests/shadow-dom/user-interaction/ranges-and-selections/test-002.html

NOTRY=true
BUG=413731
TBR= dpranke@chromium.org, jianli@chromium.org

Review URL: https://codereview.chromium.org/569673002

git-svn-id: svn://svn.chromium.org/blink/trunk@181914 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/LeakExpectations

@@ -77,3 +77,9 @@ crbug.com/366455 svg/custom/svg-fonts-fallback.xhtml [ Leak ]
 crbug.com/403987 fast/dom/element-attribute-js-null.html [ Leak ]
 crbug.com/403363 http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html [ Leak ]
 crbug.com/405125 media/media-controls-clone-crash.html [ Leak Pass ]
+
+
+# leaks in newly added web-platform tests
+crbug.com/413731 imported/web-platform-tests/shadow-dom/elements-and-dom-objects/shadowroot-object/shadowroot-methods/test-004.html [ Leak Failure ]
+crbug.com/413731 imported/web-platform-tests/shadow-dom/user-interaction/ranges-and-selections/test-001.html [ Leak Failure ]
+crbug.com/413731 imported/web-platform-tests/shadow-dom/user-interaction/ranges-and-selections/test-002.html [ Leak Failure ]