Add more WebVR layout tests, adjust test format

third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html

Index: third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html
diff --git a/third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html b/third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html
index c88611165aca3a0d39f93eacc80421e4e83c8dd5..fb7bc321d9c073deb66e7e3e3b3b45ff0a5f34be 100644
--- a/third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html
+++ b/third_party/WebKit/LayoutTests/vr/getVRDisplays_two_display.html
@@ -7,18 +7,44 @@
 <script>
 let fakeDisplays = fakeVRDisplays();
 
-vr_test((service) => {
-  return navigator.getVRDisplays().then(devices => {
-      assert_true(devices != null);
-      assert_equals(2, devices.length);
-      assert_equals(devices[0].displayName, 'Google, Inc. Daydream View');
-      assert_equals(devices[1].displayName, 'FakeVRDisplay');
-      assert_true(devices[0].capabilities.hasOrientation);
-      assert_true(devices[1].capabilities.hasOrientation);
-      assert_true(devices[0].capabilities.canPresent);
-      assert_false(devices[1].capabilities.canPresent);
+vr_test( (t) => {
+  return navigator.getVRDisplays().then( (displays) => {
+    t.step( () => {
+      assert_true(displays != null);
+      assert_equals(2, displays.length);
+    }, "getVRDisplays returned correct results");
+    let pixel = displays[0];
+    let fake = displays[1];
+
+    t.step( () => {
+      assert_equals(pixel.displayName, "Google, Inc. Daydream View");
+      assert_true(pixel.capabilities.hasOrientation);
+      assert_true(pixel.capabilities.canPresent);
+      assert_false(pixel.capabilities.hasPosition);
+      assert_false(pixel.capabilities.hasExternalDisplay);
+      assert_equals(pixel.capabilities.maxLayers, 1);
+      assert_equals(pixel.depthNear, 0.01);
+      assert_equals(pixel.depthFar, 10000.0);
+    }, "Pixel attributes are correct");
+
+    t.step( () => {
+      assert_equals(fake.displayName, "FakeVRDisplay");
+      assert_true(fake.capabilities.hasOrientation);
+      assert_false(fake.capabilities.canPresent);
+      assert_false(fake.capabilities.hasPosition);
+      assert_false(fake.capabilities.hasExternalDisplay);
+      assert_equals(fake.capabilities.maxLayers, 0);
+      assert_equals(fake.depthNear, 0.01);
+      assert_equals(fake.depthFar, 10000.0);
+    }, "Fake device attributes are correct");
+  }, (err) => {
+    t.step( () => {
+      assert_unreached("getVRDisplays rejected");
     });
-}, [fakeDisplays['Pixel'], fakeDisplays['FakeMagicWindowOnly']],
-'Test 2 VRDisplays');
+  }).then( () => {
+    t.done();
+  });
+}, [fakeDisplays["Pixel"], fakeDisplays["FakeMagicWindowOnly"]],
+"Test that getVRDisplays properly returns two displays");
 
 </script>