Battery Status API: add testing support for LayoutTests.

content/renderer/battery_status/fake_battery_status_dispatcher.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 CONTENT_RENDERER_BATTERY_STATUS_FAKE_BATTERY_STATUS_DISPATCHER_H_
+#define CONTENT_RENDERER_BATTERY_STATUS_FAKE_BATTERY_STATUS_DISPATCHER_H_
+
+#include "base/macros.h"
+
+namespace blink {
+class WebBatteryStatus;
+class WebBatteryStatusListener;
+}
+
+namespace content {
+
+class FakeBatteryStatusDispatcher {
+ public:
+  FakeBatteryStatusDispatcher();
+
+  void SetListener(blink::WebBatteryStatusListener* listener);
+  void PostBatteryStatusChange(const blink::WebBatteryStatus& status);
+
+ private:
+  blink::WebBatteryStatusListener* listener_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeBatteryStatusDispatcher);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_BATTERY_STATUS_FAKE_BATTERY_STATUS_DISPATCHER_H_