Revert "Delete CC."

cc/debug/rendering_stats_unittest.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 <string>
+
+#include "base/time/time.h"
+#include "base/values.h"
+#include "cc/debug/rendering_stats.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+static std::string ToString(const RenderingStats::TimeDeltaList& list) {
+  scoped_refptr<base::trace_event::TracedValue> value =
+      new base::trace_event::TracedValue();
+  list.AddToTracedValue("list_value", value.get());
+  return value->ToString();
+}
+
+TEST(RenderingStatsTest, TimeDeltaListEmpty) {
+  RenderingStats::TimeDeltaList time_delta_list;
+  EXPECT_EQ("{\"list_value\":[]}", ToString(time_delta_list));
+}
+
+TEST(RenderingStatsTest, TimeDeltaListNonEmpty) {
+  RenderingStats::TimeDeltaList time_delta_list;
+  time_delta_list.Append(base::TimeDelta::FromMilliseconds(234));
+  time_delta_list.Append(base::TimeDelta::FromMilliseconds(827));
+
+  EXPECT_EQ("{\"list_value\":[234.0,827.0]}", ToString(time_delta_list));
+}
+
+TEST(RenderingStatsTest, TimeDeltaListAdd) {
+  RenderingStats::TimeDeltaList time_delta_list_a;
+  time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(810));
+  time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(32));
+
+  RenderingStats::TimeDeltaList time_delta_list_b;
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(43));
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(938));
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(2));
+
+  time_delta_list_a.Add(time_delta_list_b);
+  EXPECT_EQ("{\"list_value\":[810.0,32.0,43.0,938.0,2.0]}",
+            ToString(time_delta_list_a));
+}
+
+}  // namespace
+}  // namespace cc