PageLoadMetrics renderer and browser implementation.

components/page_load_metrics/common/page_load_timing.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 "components/page_load_metrics/common/page_load_timing.h"
+
+namespace page_load_metrics {
+
+PageLoadTiming::PageLoadTiming() {}
+
+PageLoadTiming::~PageLoadTiming() {}
+
+bool PageLoadTiming::operator==(const PageLoadTiming& other) const {
+  return navigation_start == other.navigation_start &&
+         response_start == other.response_start &&
+         dom_content_loaded_event_start ==
+             other.dom_content_loaded_event_start &&
+         load_event_start == other.load_event_start &&
+         first_layout == other.first_layout;
+}
+
+bool PageLoadTiming::IsEmpty() const {
+  return navigation_start.is_null() && response_start.is_zero() &&
+         dom_content_loaded_event_start.is_zero() &&
+         load_event_start.is_zero() && first_layout.is_zero();
+}
+
+}  // namespace page_load_metrics