Add the first layout tests for WebVR to test navigator.getVRDisplays with mocked vr_service mojo in…

third_party/WebKit/LayoutTests/vr/resources/fake-vr-displays.js

Index: third_party/WebKit/LayoutTests/vr/resources/fake-vr-displays.js
diff --git a/third_party/WebKit/LayoutTests/vr/resources/fake-vr-displays.js b/third_party/WebKit/LayoutTests/vr/resources/fake-vr-displays.js
new file mode 100644
index 0000000000000000000000000000000000000000..2e50caaa21118e00ab0fed8205a4dc6988566ecc
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/vr/resources/fake-vr-displays.js
@@ -0,0 +1,41 @@
+'use strict';
+
+function fakeVRDisplays(){
+  return [{
+  index : 0,
+  displayName : "FakeVRDevice",
+  capabilities : {
+    hasOrientation : true,
+    hasPosition : false,
+    hasExternalDisplay : false,
+    canPresent : false,
+  },
+  stageParameters : null,
+  leftEye : {
+    fieldOfView : {
+      upDegrees : 45,
+      downDegrees : 45,
+      leftDegrees : 45,
+      rightDegrees : 45,
+    },
+    offset : [
+      -0.03, 0, 0
+    ],
+    renderWidth : 1024,
+    renderHeight : 1024,
+  },
+  rightEye : {
+    fieldOfView : {
+      upDegrees : 45,
+      downDegrees : 45,
+      leftDegrees : 45,
+      rightDegrees : 45,
+    },
+    offset : [
+      0.03, 0, 0
+    ],
+    renderWidth : 1024,
+    renderHeigth : 1024,
+  }
+}];
+}