First version of PerformanceObserver

LayoutTests/fast/performance/performance-observer-expected.txt

Index: LayoutTests/fast/performance/performance-observer-expected.txt
diff --git a/LayoutTests/fast/performance/performance-observer-expected.txt b/LayoutTests/fast/performance/performance-observer-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5cceece270f2327939814865b3641995897fffc9
--- /dev/null
+++ b/LayoutTests/fast/performance/performance-observer-expected.txt
@@ -0,0 +1,15 @@
+This tests that PerformanceObserver gets called the right number of times.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS entries[0].entryType is expectedEntries[0].entryType
+PASS entries[0].name is expectedEntries[0].name
+PASS entries[1].entryType is expectedEntries[1].entryType
+PASS entries[1].name is expectedEntries[1].name
+PASS entries[2].entryType is expectedEntries[2].entryType
+PASS entries[2].name is expectedEntries[2].name
+PASS successfullyParsed is true
+
+TEST COMPLETE
+