Cast: Add tests for clocks being slow/fast

media/cast/test/skewed_single_thread_task_runner.cc

+// 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.
+
+#include "media/cast/test/skewed_single_thread_task_runner.h"
+
+#include "base/logging.h"
+#include "base/time/tick_clock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+namespace cast {
+namespace test {
+
+SkewedSingleThreadTaskRunner::SkewedSingleThreadTaskRunner(
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) :
+    skew_(1.0),
+    task_runner_(task_runner) {
+}
+
+SkewedSingleThreadTaskRunner::~SkewedSingleThreadTaskRunner() {}
+
+void SkewedSingleThreadTaskRunner::SetSkew(double skew) {
+  skew_ = skew;
+}
+
+bool SkewedSingleThreadTaskRunner::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  return task_runner_->PostDelayedTask(
+      from_here,
+      task,
+      base::TimeDelta::FromMicroseconds(delay.InMicroseconds() * skew_));
+}
+
+bool SkewedSingleThreadTaskRunner::RunsTasksOnCurrentThread() const {
+  return task_runner_->RunsTasksOnCurrentThread();
+}
+
+bool SkewedSingleThreadTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  return task_runner_->PostNonNestableDelayedTask(
+      from_here,
+      task,
+      base::TimeDelta::FromMicroseconds(delay.InMicroseconds() * skew_));
+}
+
+}  // namespace test
+}  // namespace cast
+}  // namespace media