Fix testharness paths in imported/wpt/* except dom and html.

third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html

Index: third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html b/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html
index 7aa1a0176e888ef5a81b130b54ea859c7c4da115..f831db9522a0ab1b1b9b2ff417a13053677775cf 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html
+++ b/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/untriaged/events/retargeting-relatedtarget/test-003.html
@@ -14,8 +14,8 @@ policies and contribution forms [3].
 <link rel="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
 <link rel="help" href="https://w3c.github.io/webcomponents/spec/shadow/#event-relatedtarget-retargeting">
 <meta name="assert" content="The value of the Event object's relatedTarget attribute must be the result of the retargeting algorithm with the event's currentTarget and relatedTarget as input. The result is called a relative related target.">
-<script src="../../../../../../resources/testharness.js"></script>
-<script src="../../../../../../resources/testharnessreport.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
 <script src="../../../../html/resources/common.js"></script>
 <script src="../../../resources/shadow-dom-utils.js"></script>
 </head>