Separate usb device handle from usb device. (deprecate)

chrome/test/data/extensions/api_test/usb/device_handling/test.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.
 
 var usb = chrome.usb;
 
 var tests = [
   function explicitCloseDevice() {
-    usb.findDevices({vendorId: 0, productId: 0}, function(devices) {
-      usb.closeDevice(devices[0]);
-      chrome.test.succeed();
+    usb.getDevices({vendorId: 0, productId: 0}, function(devices) {
+      usb.openDevice(devices[0], function(device) {
+        usb.closeDevice(device, function() {
+          chrome.test.assertEq(undefined, chrome.runtime.lastError);
+          chrome.test.succeed();
+        });
+      });
     });
   },
   function resetDevice() {
-    usb.findDevices({vendorId: 0, productId: 0}, function(devices) {
-      usb.resetDevice(devices[0], function(result) {
-        chrome.test.assertEq(result, true);
-        // Ensure the device is still open.
-        var transfer = {
-          direction: "out",
-          endpoint: 2,
-          data: new ArrayBuffer(1)
-        };
-        usb.interruptTransfer(devices[0], transfer, function(result) {
-          // This is designed to fail.
-          usb.resetDevice(devices[0], function(result) {
-            chrome.test.assertEq(result, false);
-            usb.interruptTransfer(devices[0], transfer, function(result) {
-              chrome.test.assertEq(result, undefined);
-              chrome.test.assertEq(
-                  chrome.runtime.lastError && chrome.runtime.lastError.message,
-                  'No such device.'
-              );
-              chrome.test.succeed();
+    usb.getDevices({vendorId: 0, productId: 0}, function(devices) {
+      usb.openDevice(devices[0], function(device) {
+        usb.resetDevice(device, function(result) {
+          chrome.test.assertEq(result, true);
+          // Ensure the device is still open.
+          var transfer = {direction: "out", endpoint: 2,
+                          data: new ArrayBuffer(1)};
+          usb.interruptTransfer(device, transfer, function(result) {
+              // This is designed to fail.
+            usb.resetDevice(device, function(result) {
+              chrome.test.assertEq(result, false);
+              usb.interruptTransfer(device, transfer, function(result) {
+                chrome.test.assertEq(result, undefined);
+                chrome.test.assertEq(
+                    chrome.runtime.lastError &&
+                    chrome.runtime.lastError.message,
+                    'No such device.');
+                chrome.test.succeed();
+              });
             });
           });
         });
       });
     });
   },
 ];
 
 chrome.test.runTests(tests);