Move PageLoadTiming TimeDelta fields to a common header.

chrome/common/page_load_metrics/page_load_timing_unittest.cc

+// Copyright 2016 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 "chrome/common/page_load_metrics/page_load_timing.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class PageLoadTimingTest : public testing::Test {};
+
+TEST_F(PageLoadTimingTest, IsEmpty1) {
+  page_load_metrics::PageLoadTiming timing;
+  ASSERT_TRUE(timing.IsEmpty());
+  timing.navigation_start = base::Time::Now();
+  ASSERT_FALSE(timing.IsEmpty());
+}
+
+TEST_F(PageLoadTimingTest, IsEmpty2) {
+  page_load_metrics::PageLoadTiming timing;
+  ASSERT_TRUE(timing.IsEmpty());
+  timing.parse_start = base::TimeDelta::FromSeconds(1);
+  ASSERT_FALSE(timing.IsEmpty());
+}
+
+TEST_F(PageLoadTimingTest, Equal) {
+  page_load_metrics::PageLoadTiming timing1;
+  page_load_metrics::PageLoadTiming timing2;
+  ASSERT_TRUE(timing1 == timing2);
+
+  timing1.parse_start = base::TimeDelta::FromSeconds(1);
+  ASSERT_FALSE(timing1 == timing2);
+  timing2.parse_start = timing1.parse_start;
+  ASSERT_TRUE(timing1 == timing2);
+
+  timing1.navigation_start = base::Time::Now();
+  ASSERT_FALSE(timing1 == timing2);
+  timing2.navigation_start = timing1.navigation_start;
+  ASSERT_TRUE(timing1 == timing2);
+}