Replaced TestNowSource with SimpleTestTickClock.

components/scheduler/child/test_always_fail_time_source.h

Index: components/scheduler/child/test_always_fail_time_source.h
diff --git a/components/scheduler/child/test_always_fail_time_source.h b/components/scheduler/child/test_always_fail_time_source.h
new file mode 100644
index 0000000000000000000000000000000000000000..4f11c04787f46798b66d6290602b82e4a5d65034
--- /dev/null
+++ b/components/scheduler/child/test_always_fail_time_source.h
@@ -0,0 +1,29 @@
+// 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 COMPONENTS_SCHEDULER_CHILD_TEST_ALWAYS_FAIL_TIME_SOURCE_H_
+#define COMPONENTS_SCHEDULER_CHILD_TEST_ALWAYS_FAIL_TIME_SOURCE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/test/simple_test_tick_clock.h"
+#include "components/scheduler/child/time_source.h"
+
+namespace scheduler {
+
+class TestAlwaysFailTimeSource : public TimeSource {
+ public:
+  explicit TestAlwaysFailTimeSource(base::SimpleTestTickClock* time_source);
+  ~TestAlwaysFailTimeSource() override;
+
+  base::TimeTicks Now() const override;
+
+ private:
+  base::SimpleTestTickClock* time_source_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestAlwaysFailTimeSource);
+};
+
+}  // namespace scheduler
+
+#endif  // COMPONENTS_SCHEDULER_CHILD_TEST_ALWAYS_FAIL_TIME_SOURCE_H_