Revert of Change the battery-status layout tests to use JS mocks.

third_party/WebKit/LayoutTests/battery-status/resources/mock-battery-monitor.js

-"use strict";
-
-let mockBatteryMonitor = loadMojoModules(
-    'mockBatteryMonitor',
-    ['device/battery/battery_monitor.mojom',
-     'device/battery/battery_status.mojom',
-     'mojo/public/js/router',
-    ]).then(mojo => {
-  let [batteryMonitor, batteryStatus, router] = mojo.modules;
-
-  class MockBatteryMonitor extends batteryMonitor.BatteryMonitor.stubClass {
-    constructor(serviceRegistry) {
-      super();
-      serviceRegistry.addServiceOverrideForTesting(
-          batteryMonitor.BatteryMonitor.name,
-          handle => this.connect_(handle));
-
-      this.serviceRegistry_ = serviceRegistry;
-      this.pendingRequests_ = [];
-      this.status_ = null;
-    }
-
-    connect_(handle) {
-      this.router_ = new router.Router(handle);
-      this.router_.setIncomingReceiver(this);
-    }
-
-    queryNextStatus() {
-      let result = new Promise(resolve => this.pendingRequests_.push(resolve));
-      this.runCallbacks_();
-      return result;
-    }
-
-    updateBatteryStatus(charging, chargingTime, dischargingTime, level) {
-      this.status_ = new batteryStatus.BatteryStatus();
-      this.status_.charging = charging;
-      this.status_.charging_time = chargingTime;
-      this.status_.discharging_time = dischargingTime;
-      this.status_.level = level;
-      this.runCallbacks_();
-    }
-
-    runCallbacks_() {
-      if (!this.status_ || !this.pendingRequests_.length)
-        return;
-
-      while (this.pendingRequests_.length) {
-        this.pendingRequests_.pop()({status: this.status_});
-      }
-      this.status_ = null;
-    }
-  }
-  return new MockBatteryMonitor(mojo.serviceRegistry);
-});
-
-let batteryInfo;
-let lastSetMockBatteryInfo;
-
-function setAndFireMockBatteryInfo(charging, chargingTime, dischargingTime,
-                                   level) {
-  lastSetMockBatteryInfo = { charging: charging,
-                      chargingTime: chargingTime,
-                      dischargingTime: dischargingTime,
-                      level: level };
-  mockBatteryMonitor.then(mock => mock.updateBatteryStatus(
-      charging, chargingTime, dischargingTime, level));
-}
-
-// compare obtained battery values with the mock values
-function testIfBatteryStatusIsUpToDate(batteryManager) {
-  batteryInfo = batteryManager;
-  shouldBeDefined("batteryInfo");
-  shouldBeDefined("lastSetMockBatteryInfo");
-  shouldBe('batteryInfo.charging', 'lastSetMockBatteryInfo.charging');
-  shouldBe('batteryInfo.chargingTime', 'lastSetMockBatteryInfo.chargingTime');
-  shouldBe('batteryInfo.dischargingTime',
-           'lastSetMockBatteryInfo.dischargingTime');
-  shouldBe('batteryInfo.level', 'lastSetMockBatteryInfo.level');
-}
-
-function batteryStatusFailure() {
-  testFailed('failed to successfully resolve the promise');
-  setTimeout(finishJSTest, 0);
-}
-
-var mockBatteryMonitorReady = mockBatteryMonitor.then();