Add additional properties to display system info on ChromeOS

chrome/test/data/extensions/api_test/systeminfo/display/test_display_api.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // systeminfo.memory api test
 // browser_tests --gtest_filter=SystemInfoMemoryApiTest.*
 
 chrome.test.runTests([
   function testGet() {
     for(var i = 0; i < 10; ++i) {
       chrome.systemInfo.display.getDisplayInfo(
         chrome.test.callbackPass(function(result) {
-          chrome.test.assertEq(2, result.length);
+          chrome.test.assertEq(4, result.length);
           for (var i = 0; i < result.length; i++) {
             var info = result[i];
-            chrome.test.assertEq('DISPLAY', info.id);
-            chrome.test.assertEq('DISPLAY NAME', info.name);
+            chrome.test.assertEq('' + i, info.id);
+            chrome.test.assertEq('DISPLAY NAME FOR ' + i, info.name);
             chrome.test.assertEq(i == 0 ? true : false, info.isPrimary);
             chrome.test.assertEq(i == 0 ? true : false, info.isInternal);
+            if (i == 1) {
+              chrome.test.assertEq('0', info.mirroringSourceId);
+            } else {
+              chrome.test.assertEq('', info.mirroringSourceId);
+            }
             chrome.test.assertEq(true, info.isEnabled);
+            chrome.test.assertEq(90 * i, info.rotation);
             chrome.test.assertEq(96.0, info.dpiX);
             chrome.test.assertEq(96.0, info.dpiY);
             chrome.test.assertEq(0, info.bounds.left);
             chrome.test.assertEq(0, info.bounds.top);
             chrome.test.assertEq(1280, info.bounds.width);
             chrome.test.assertEq(720, info.bounds.height);
+            if (i == 0) {
+              chrome.test.assertEq(20, info.overscan.left);
+              chrome.test.assertEq(40, info.overscan.top);
+              chrome.test.assertEq(60, info.overscan.right);
+              chrome.test.assertEq(80, info.overscan.bottom);
+            } else {
+              chrome.test.assertEq(0, info.overscan.left);
+              chrome.test.assertEq(0, info.overscan.top);
+              chrome.test.assertEq(0, info.overscan.right);
+              chrome.test.assertEq(0, info.overscan.bottom);
+            }
             chrome.test.assertEq(0, info.workArea.left);
             chrome.test.assertEq(0, info.workArea.top);
             chrome.test.assertEq(960, info.workArea.width);
             chrome.test.assertEq(720, info.workArea.height);
         }
       }));
     }
   }
 ]);