Import hr-time and user-timing tests, remove redundant webperf copies

LayoutTests/imported/web-platform-tests/user-timing/test_user_timing_clear_marks.html

Index: LayoutTests/imported/web-platform-tests/user-timing/test_user_timing_clear_marks.html
diff --git a/LayoutTests/http/tests/w3c/webperf/approved/UserTiming/test_user_timing_clear_marks.htm b/LayoutTests/imported/web-platform-tests/user-timing/test_user_timing_clear_marks.html
similarity index 94%
rename from LayoutTests/http/tests/w3c/webperf/approved/UserTiming/test_user_timing_clear_marks.htm
rename to LayoutTests/imported/web-platform-tests/user-timing/test_user_timing_clear_marks.html
index 2e978e5d2c351aac0315d5bcd6423e3b2aa3fedc..e6da7bc17888e61af66cf2459b24fe3d11bafc8b 100644
--- a/LayoutTests/http/tests/w3c/webperf/approved/UserTiming/test_user_timing_clear_marks.htm
+++ b/LayoutTests/imported/web-platform-tests/user-timing/test_user_timing_clear_marks.html
@@ -4,10 +4,10 @@
         <meta charset="UTF-8" />
         <title>window.performance User Timing clearMarks() method is working properly</title>
         <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
-        <link rel="help" href="http://127.0.0.1:8000/webperf/specs/UserTiming/#dom-performance-clearmarks"/>
-        <script src="/w3c/resources/testharness.js"></script>
-        <script src="/w3c/resources/testharnessreport.js"></script>
-        <script src="/w3c/webperf/resources/webperftestharness.js"></script>
+        <link rel="help" href="http://www.w3.org/TR/user-timing/#dom-performance-clearmarks"/>
+        <script src="../../../resources/testharness.js"></script>
+        <script src="../../../resources/testharnessreport.js"></script>
+        <script src="resources/webperftestharness.js"></script>
 
     <script type="text/javascript">
         // test marks
@@ -18,7 +18,7 @@
         var entries;
         var pass;
 
-        setup({timeout:1000, explicit_done: true});
+        setup({explicit_done: true});
 
         test_namespace();