Move the USB API tests into app_shell_browsertests.

chrome/test/data/extensions/api_test/usb/transfer_event/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 controlTransfer() {
-    usb.findDevices({vendorId: 0, productId: 0}, function (devices) {
-      var device = devices[0];
-      var transfer = new Object();
-      transfer.direction = "out";
-      transfer.recipient = "device";
-      transfer.requestType = "standard";
-      transfer.request = 1;
-      transfer.value = 2;
-      transfer.index = 3;
-      transfer.data = new ArrayBuffer(1);
-
-      usb.controlTransfer(device, transfer, function (result) {
-        chrome.test.succeed();
-      });
-    });
-  },
-  function bulkTransfer() {
-    usb.findDevices({vendorId: 0, productId: 0}, function (devices) {
-      var device = devices[0];
-      var transfer = new Object();
-      transfer.direction = "out";
-      transfer.endpoint = 1;
-      transfer.data = new ArrayBuffer(1);
-
-      usb.bulkTransfer(device, transfer, function (result) {
-        chrome.test.succeed();
-      });
-    });
-  },
-  function interruptTransfer() {
-    usb.findDevices({vendorId: 0, productId: 0}, function (devices) {
-      var device = devices[0];
-      var transfer = new Object();
-      transfer.direction = "out";
-      transfer.endpoint = 2;
-      transfer.data = new ArrayBuffer(1);
-
-      usb.interruptTransfer(device, transfer, function (result) {
-        chrome.test.succeed();
-      });
-    });
-  },
-  function isochronousTransfer() {
-    usb.findDevices({vendorId: 0, productId: 0}, function (devices) {
-      var device = devices[0];
-      var transfer = new Object();
-      transfer.direction = "out";
-      transfer.endpoint = 3;
-      transfer.data = new ArrayBuffer(1);
-
-      var isoTransfer = new Object();
-      isoTransfer.transferInfo = transfer;
-      isoTransfer.packets = 1;
-      isoTransfer.packetLength = 1;
-
-      usb.isochronousTransfer(device, isoTransfer, function (result) {
-        chrome.test.succeed();
-      });
-    });
-  },
-];
-
-chrome.test.runTests(tests);