Migrate page_load_metrics out of components.

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(const PageLoadTiming& other) = default;
-
-PageLoadTiming::~PageLoadTiming() {}
-
-bool PageLoadTiming::operator==(const PageLoadTiming& other) const {
-  return navigation_start == other.navigation_start &&
-         response_start == other.response_start &&
-         dom_loading == other.dom_loading &&
-         dom_content_loaded_event_start ==
-             other.dom_content_loaded_event_start &&
-         load_event_start == other.load_event_start &&
-         first_layout == other.first_layout &&
-         first_paint == other.first_paint &&
-         first_text_paint == other.first_text_paint &&
-         first_image_paint == other.first_image_paint &&
-         parse_start == other.parse_start && parse_stop == other.parse_stop &&
-         parse_blocked_on_script_load_duration ==
-             other.parse_blocked_on_script_load_duration &&
-         parse_blocked_on_script_load_from_document_write_duration ==
-             other.parse_blocked_on_script_load_from_document_write_duration;
-}
-
-bool PageLoadTiming::IsEmpty() const {
-  return navigation_start.is_null() && !response_start && !dom_loading &&
-         !dom_content_loaded_event_start && !load_event_start &&
-         !first_layout && !first_paint && !first_text_paint &&
-         !first_image_paint && !parse_start && !parse_stop &&
-         !parse_blocked_on_script_load_duration &&
-         !parse_blocked_on_script_load_from_document_write_duration;
-}
-
-PageLoadMetadata::PageLoadMetadata() {}
-
-bool PageLoadMetadata::operator==(const PageLoadMetadata& other) const {
-  return behavior_flags == other.behavior_flags;
-}
-
-}  // namespace page_load_metrics