Migrate page_load_metrics out of components.

chrome/browser/page_load_metrics/observers/core_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 "chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
 #include "chrome/browser/browser_process.h"
-#include "components/page_load_metrics/browser/page_load_metrics_util.h"
+#include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
 #include "components/rappor/rappor_service.h"
 #include "components/rappor/rappor_utils.h"
 #include "ui/base/page_transition_types.h"
 
 namespace {
 
 // The number of buckets in the bitfield histogram. These buckets are described
 // in rappor.xml in PageLoad.CoarseTiming.NavigationToFirstContentfulPaint.
 // The bucket flag is defined by 1 << bucket_index, and is the bitfield
 // representing which timing bucket the page load falls into, i.e. 000010
@@ skipping 628 matching lines @@
       RapporHistogramBucketIndex(timing.first_contentful_paint.value());
   sample->SetFlagsField("Bucket", uint64_t(1) << bucket_index,
                         kNumRapporHistogramBuckets);
   // The IsSlow flag is just a one bit boolean if the first contentful paint
   // was > 10s.
   sample->SetFlagsField(
       "IsSlow", timing.first_contentful_paint.value().InSecondsF() >= 10, 1);
   rappor_service->RecordSampleObj(internal::kRapporMetricsNameCoarseTiming,
                                   std::move(sample));
 }