[Presentation API] PresentationRequest::getAvailability() should return the same promise

third_party/WebKit/LayoutTests/presentation/presentationrequest.html

Index: third_party/WebKit/LayoutTests/presentation/presentationrequest.html
diff --git a/third_party/WebKit/LayoutTests/presentation/presentationrequest.html b/third_party/WebKit/LayoutTests/presentation/presentationrequest.html
index d4b538c2fda08c92d618cc90abb9a24c805a1769..c19a84db49bb7044fb7ff1d1c9a2fb49bed5c7ed 100644
--- a/third_party/WebKit/LayoutTests/presentation/presentationrequest.html
+++ b/third_party/WebKit/LayoutTests/presentation/presentationrequest.html
@@ -23,6 +23,13 @@ test(function() {
   assert_not_equals(navigator.presentation.defaultRequest.onconnectionavailable, undefined);
 }, "Test that navigator.presentation.defaultRequest.onconnectionavailable isn't reset after gc()");
 
+test(function() {
+  var request = new PresentationRequest("http://example.com");
+  var promise_1 = request.getAvailability();
+  var promise_2 = request.getAvailability();
+  assert_true(promise_1 === promise_2);
+}, "Test that the PresentationRequest.getAvailability() returns same promise object.");
+
 </script>
 </body>
 </html>