Add service unittest for WakeLockServiceImpl.

device/wake_lock/wake_lock_service_impl_for_testing.cc

Index: device/wake_lock/wake_lock_service_impl_for_testing.cc
diff --git a/device/wake_lock/wake_lock_service_impl_for_testing.cc b/device/wake_lock/wake_lock_service_impl_for_testing.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6dcd921d5e421303e3a4cf989486924bacf533fe
--- /dev/null
+++ b/device/wake_lock/wake_lock_service_impl_for_testing.cc
@@ -0,0 +1,57 @@
+// 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.
+
+#include "device/wake_lock/wake_lock_service_impl_for_testing.h"
+
+#include <utility>
+
+namespace device {
+
+WakeLockServiceImplForTesting::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)
+    : WakeLockServiceImpl(std::move(request),
+                          type,
+                          reason,
+                          description,
+                          context_id,
+                          native_view_getter,
+                          file_task_runner),
+      has_wake_lock_(false) {}
+
+WakeLockServiceImplForTesting::~WakeLockServiceImplForTesting() {}
+
+void WakeLockServiceImplForTesting::HasWakeLockForTests(
+    HasWakeLockForTestsCallback callback) {
+  std::move(callback).Run(has_wake_lock_);
+}
+
+void WakeLockServiceImplForTesting::UpdateWakeLock() {
+  DCHECK(num_lock_requests_ >= 0);
+
+  if (num_lock_requests_) {
+    if (!has_wake_lock_)
+      CreateWakeLock();
+  } else {
+    if (has_wake_lock_)
+      RemoveWakeLock();
+  }
+}
+
+void WakeLockServiceImplForTesting::CreateWakeLock() {
+  DCHECK(!has_wake_lock_);
+  has_wake_lock_ = true;
+}
+
+void WakeLockServiceImplForTesting::RemoveWakeLock() {
+  DCHECK(has_wake_lock_);
+  has_wake_lock_ = false;
+}
+
+}  // namespace device