Remove dependency on cc::TestNowSource from scheduler code

content/test/test_time_source.cc

+// 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 "content/test/test_time_source.h"
+
+#include "cc/test/test_now_source.h"
+
+namespace content {
+
+TestTimeSource::TestTimeSource(scoped_refptr<cc::TestNowSource> time_source)
+    : time_source_(time_source) {
+}
+
+TestTimeSource::~TestTimeSource() {
+}
+
+base::TimeTicks TestTimeSource::Now() const {
+  return time_source_->Now();
+}
+
+}  // namespace content