Migrate page_load_metrics out of components.

components/page_load_metrics/renderer/page_timing_metrics_sender.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/renderer/page_timing_metrics_sender.h"
-
-#include <utility>
-
-#include "base/callback.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "components/page_load_metrics/common/page_load_metrics_messages.h"
-#include "ipc/ipc_sender.h"
-
-namespace page_load_metrics {
-
-namespace {
-const int kInitialTimerDelayMillis = 50;
-const int kTimerDelayMillis = 1000;
-}  // namespace
-
-PageTimingMetricsSender::PageTimingMetricsSender(
-    IPC::Sender* ipc_sender,
-    int routing_id,
-    std::unique_ptr<base::Timer> timer,
-    const PageLoadTiming& initial_timing)
-    : ipc_sender_(ipc_sender),
-      routing_id_(routing_id),
-      timer_(std::move(timer)),
-      last_timing_(initial_timing),
-      metadata_(PageLoadMetadata()) {
-  // Send an initial IPC relatively early to help track aborts.
-  EnsureSendTimer(kInitialTimerDelayMillis);
-}
-
-// On destruction, we want to send any data we have if we have a timer
-// currently running (and thus are talking to a browser process)
-PageTimingMetricsSender::~PageTimingMetricsSender() {
-  if (timer_->IsRunning()) {
-    timer_->Stop();
-    SendNow();
-  }
-}
-
-void PageTimingMetricsSender::DidObserveLoadingBehavior(
-    blink::WebLoadingBehaviorFlag behavior) {
-  if (behavior & metadata_.behavior_flags)
-    return;
-  metadata_.behavior_flags |= behavior;
-  EnsureSendTimer(kTimerDelayMillis);
-}
-
-void PageTimingMetricsSender::Send(const PageLoadTiming& timing) {
-  if (timing == last_timing_)
-    return;
-
-  // We want to make sure that each PageTimingMetricsSender is associated
-  // with a distinct page navigation. Because we reset the object on commit,
-  // we can trash last_timing_ on a provisional load before SendNow() fires.
-  if (!last_timing_.navigation_start.is_null() &&
-      last_timing_.navigation_start != timing.navigation_start) {
-    return;
-  }
-
-  last_timing_ = timing;
-  EnsureSendTimer(kTimerDelayMillis);
-}
-
-void PageTimingMetricsSender::EnsureSendTimer(int delay) {
-  if (!timer_->IsRunning())
-    timer_->Start(
-        FROM_HERE, base::TimeDelta::FromMilliseconds(delay),
-        base::Bind(&PageTimingMetricsSender::SendNow, base::Unretained(this)));
-}
-
-void PageTimingMetricsSender::SendNow() {
-  ipc_sender_->Send(new PageLoadMetricsMsg_TimingUpdated(
-      routing_id_, last_timing_, metadata_));
-}
-
-}  // namespace page_load_metrics