[polymer] Merge of master into polymer10-migration

tracing/tracing/base/utils_test.html

Index: tracing/tracing/base/utils_test.html
diff --git a/tracing/tracing/base/utils_test.html b/tracing/tracing/base/utils_test.html
index b53934acc9c9b71bb25a2e076e408dbf3e459bf4..8e7c91a7fceb57231f766e86c90dc45b4e7ccc64 100644
--- a/tracing/tracing/base/utils_test.html
+++ b/tracing/tracing/base/utils_test.html
@@ -25,5 +25,9 @@ tr.b.unittest.testSuite(function() {
     var ex = tr.b.normalizeException(err);
     assert.equal(ex.typeName, 'MyError');
   });
+
+  test('formatDate', function() {
+    assert.strictEqual(tr.b.formatDate(new Date(0)), '1970-01-01 00:00:00');
+  });
 });
 </script>