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

third_party/WebKit/Source/modules/battery/BatteryDispatcher.h

 // Copyright 2014 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.
 
 #ifndef BatteryDispatcher_h
 #define BatteryDispatcher_h
 
 #include "core/frame/PlatformEventDispatcher.h"
 #include "device/battery/battery_monitor.mojom.h"
 #include "modules/ModulesExport.h"
 #include "modules/battery/BatteryManager.h"
 #include "modules/battery/battery_status.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
 class MODULES_EXPORT BatteryDispatcher final : public GarbageCollectedFinalized<BatteryDispatcher>, public PlatformEventDispatcher {
     USING_GARBAGE_COLLECTED_MIXIN(BatteryDispatcher);
     WTF_MAKE_NONCOPYABLE(BatteryDispatcher);
 public:
     static BatteryDispatcher& instance();
 
     const BatteryStatus* latestData() const
     {
         return m_hasLatestData ? &m_batteryStatus : nullptr;
     }
 
-    void updateBatteryStatusForTesting(const BatteryStatus& batteryStatus)
-    {
-        updateBatteryStatus(batteryStatus);
-    }
-
 private:
     BatteryDispatcher();
 
     void queryNextStatus();
     void onDidChange(device::BatteryStatusPtr);
     void updateBatteryStatus(const BatteryStatus&);
 
     // Inherited from PlatformEventDispatcher.
     void startListening() override;
     void stopListening() override;
 
     device::BatteryMonitorPtr m_monitor;
     BatteryStatus m_batteryStatus;
     bool m_hasLatestData;
 };
 
 } // namespace blink
 
 #endif // BatteryDispatcher_h