diff --git a/dom/base/nsStyleLinkElement.cpp b/dom/base/nsStyleLinkElement.cpp
index 261e86386606d..0464db9656870 100644
--- a/dom/base/nsStyleLinkElement.cpp
+++ b/dom/base/nsStyleLinkElement.cpp
@@ -1321,21 +1321,7 @@ doc
 thisContent
 -
 >
-IsInShadowTree
-(
-)
-?
-thisContent
--
->
-OwnerDoc
-(
-)
-:
-thisContent
--
->
-GetUncomposedDoc
+GetComposedDoc
 (
 )
 ;
diff --git a/testing/web-platform/tests/shadow-dom/ShadowRoot-interface.html b/testing/web-platform/tests/shadow-dom/ShadowRoot-interface.html
index 4b94b040269e5..60c132bcee8ee 100644
--- a/testing/web-platform/tests/shadow-dom/ShadowRoot-interface.html
+++ b/testing/web-platform/tests/shadow-dom/ShadowRoot-interface.html
@@ -1224,33 +1224,6 @@
 }
 )
 ;
-assert_equals
-(
-shadowRoot
-.
-styleSheets
-.
-length
-0
-'
-shadowRoot
-.
-styleSheets
-must
-be
-empty
-when
-the
-shadow
-root
-does
-not
-contain
-any
-stylesheets
-'
-)
-;
 shadowRoot
 .
 innerHTML
@@ -1296,6 +1269,40 @@
 styleSheets
 .
 length
+0
+'
+shadowRoot
+.
+styleSheets
+must
+be
+empty
+when
+the
+shadow
+root
+is
+not
+connected
+'
+)
+;
+document
+.
+body
+.
+appendChild
+(
+host
+)
+;
+assert_equals
+(
+shadowRoot
+.
+styleSheets
+.
+length
 2
 '
 shadowRoot
diff --git a/testing/web-platform/tests/shadow-dom/untriaged/styles/test-003.html b/testing/web-platform/tests/shadow-dom/untriaged/styles/test-003.html
index 48ccedd42fc4e..d46ee7145682b 100644
--- a/testing/web-platform/tests/shadow-dom/untriaged/styles/test-003.html
+++ b/testing/web-platform/tests/shadow-dom/untriaged/styles/test-003.html
@@ -410,46 +410,6 @@
 '
 )
 ;
-/
-/
-TODO
-Now
-this
-tests
-produces
-an
-error
-on
-Chromium
-because
-styleSheets
-.
-length
-/
-/
-returns
-0
-when
-the
-shadow
-root
-is
-orphaned
-.
-/
-/
-Tracking
-bug
-:
-http
-:
-/
-/
-crbug
-.
-com
-/
-392771
 test
 (
 unit
@@ -536,27 +496,6 @@
 style
 )
 ;
-/
-/
-The
-following
-line
-fixes
-the
-issue
-on
-Chromium
-http
-:
-/
-/
-crbug
-.
-com
-/
-392771
-/
-/
 d
 .
 body