Migrate page_load_metrics out of components.

components/page_load_metrics/browser/page_load_metrics_observer.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/browser/page_load_metrics_observer.h"
-
-namespace page_load_metrics {
-
-PageLoadExtraInfo::PageLoadExtraInfo(
-    const base::Optional<base::TimeDelta>& first_background_time,
-    const base::Optional<base::TimeDelta>& first_foreground_time,
-    bool started_in_foreground,
-    const GURL& committed_url,
-    const base::Optional<base::TimeDelta>& time_to_commit,
-    UserAbortType abort_type,
-    const base::Optional<base::TimeDelta>& time_to_abort,
-    const PageLoadMetadata& metadata)
-    : first_background_time(first_background_time),
-      first_foreground_time(first_foreground_time),
-      started_in_foreground(started_in_foreground),
-      committed_url(committed_url),
-      time_to_commit(time_to_commit),
-      abort_type(abort_type),
-      time_to_abort(time_to_abort),
-      metadata(metadata) {}
-
-PageLoadExtraInfo::PageLoadExtraInfo(const PageLoadExtraInfo& other) = default;
-
-PageLoadExtraInfo::~PageLoadExtraInfo() {}
-
-FailedProvisionalLoadInfo::FailedProvisionalLoadInfo(base::TimeDelta interval,
-                                                     net::Error error)
-    : time_to_failed_provisional_load(interval), error(error) {}
-
-FailedProvisionalLoadInfo::~FailedProvisionalLoadInfo() {}
-
-}  // namespace page_load_metrics