Import wpt@cd5cce9780f84cee679919679b8199084ea96d54

third_party/WebKit/LayoutTests/external/wpt/user-timing/resources/webperftestharness.js

 /*
 Distributed under both the W3C Test Suite License [1] and the W3C
 3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
 policies and contribution forms [3].
 
 [1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
 [2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
 [3] http://www.w3.org/2004/10/27-testcases
  */
 
@@ skipping 20 matching lines @@
     'redirectStart',
     'requestStart',
     'responseEnd',
     'responseStart',
     'unloadEventEnd',
     'unloadEventStart'
 ];
 
 var namespace_check = false;
 
+function has_required_interfaces()
+{
+    if (window.performance.mark == undefined ||
+        window.performance.clearMarks == undefined ||
+        window.performance.measure == undefined ||
+        window.performance.clearMeasures == undefined ||
+        window.performance.getEntriesByName == undefined ||
+        window.performance.getEntriesByType == undefined ||
+        window.performance.getEntries == undefined) {
+        return false;
+    }
+
+    return true;
+}
+
 //
 // All test() functions in the WebPerf test suite should use wp_test() instead.
 //
 // wp_test() validates the window.performance namespace exists prior to running tests and
 // immediately shows a single failure if it does not.
 //
 
 function wp_test(func, msg, properties)
 {
     // only run the namespace check once
@@ skipping 95 matching lines @@
 
 function test_greater_or_equals(value, greater_than, msg, properties)
 {
     wp_test(function () { assert_true(value >= greater_than, msg); }, msg, properties);
 }
 
 function test_not_equals(value, notequals, msg, properties)
 {
     wp_test(function() { assert_true(value !== notequals, msg); }, msg, properties);
 }