Add service unittest for WakeLockServiceImpl.

device/wake_lock/wake_lock_service_impl_for_testing.h

Index: device/wake_lock/wake_lock_service_impl_for_testing.h
diff --git a/device/wake_lock/wake_lock_service_impl_for_testing.h b/device/wake_lock/wake_lock_service_impl_for_testing.h
new file mode 100644
index 0000000000000000000000000000000000000000..23409d3593a2c9307497f3d95350405f27029e3d
--- /dev/null
+++ b/device/wake_lock/wake_lock_service_impl_for_testing.h
@@ -0,0 +1,47 @@
+// Copyright 2015 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 SERVICES_DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_FOR_TESTING_H_
+#define SERVICES_DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_FOR_TESTING_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
+#include "device/wake_lock/public/interfaces/wake_lock_context.mojom.h"
+#include "device/wake_lock/public/interfaces/wake_lock_service.mojom.h"
+#include "device/wake_lock/wake_lock_service_impl.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace device {
+
+class WakeLockServiceImplForTesting : public WakeLockServiceImpl {
+ public:
+  WakeLockServiceImplForTesting(
+      mojom::WakeLockServiceRequest request,
+      mojom::WakeLockType type,
+      mojom::WakeLockReason reason,
+      const std::string& description,
+      int context_id,
+      WakeLockContextCallback native_view_getter,
+      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
+  ~WakeLockServiceImplForTesting() override;
+
+  void HasWakeLockForTests(HasWakeLockForTestsCallback callback) override;
+
+ private:
+  void UpdateWakeLock() override;
+  void CreateWakeLock() override;
+  void RemoveWakeLock() override;
+
+  bool has_wake_lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(WakeLockServiceImplForTesting);
+};
+
+}  // namespace device
+
+#endif  // SERVICES_DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_FOR_TESTING_H_