Migrate page_load_metrics out of components.

components/page_load_metrics/browser/page_load_metrics_observer.h

Index: components/page_load_metrics/browser/page_load_metrics_observer.h
diff --git a/components/page_load_metrics/browser/page_load_metrics_observer.h b/components/page_load_metrics/browser/page_load_metrics_observer.h
deleted file mode 100644
index ffc494793ca1dd4551b80734cfbd65665f393881..0000000000000000000000000000000000000000
--- a/components/page_load_metrics/browser/page_load_metrics_observer.h
+++ /dev/null
@@ -1,212 +0,0 @@
-// 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.
-
-#ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_OBSERVER_H_
-#define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_OBSERVER_H_
-
-#include "base/macros.h"
-#include "base/optional.h"
-#include "components/page_load_metrics/common/page_load_timing.h"
-#include "content/public/browser/navigation_handle.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-#include "url/gurl.h"
-
-namespace page_load_metrics {
-
-// This enum represents how a page load ends. If the action occurs before the
-// page load finishes (or reaches some point like first paint), then we consider
-// the load to be aborted.
-enum UserAbortType {
-  // Represents no abort.
-  ABORT_NONE,
-
-  // If the user presses reload or shift-reload.
-  ABORT_RELOAD,
-
-  // The user presses the back/forward button.
-  ABORT_FORWARD_BACK,
-
-  // If the navigation is replaced by a new navigation. This includes link
-  // clicks, typing in the omnibox (not a reload), and form submissions.
-  ABORT_NEW_NAVIGATION,
-
-  // If the user presses the stop X button.
-  ABORT_STOP,
-
-  // If the navigation is aborted by closing the tab or browser.
-  ABORT_CLOSE,
-
-  // We don't know why the navigation aborted. This is the value we assign to an
-  // aborted load if the only signal we get is a provisional load finishing
-  // without committing, either without error or with net::ERR_ABORTED.
-  ABORT_OTHER,
-
-  // The load aborted due to another navigation, but it isn't clear what type of
-  // navigation it was.
-  ABORT_UNKNOWN_NAVIGATION,
-
-  // Add values before this final count.
-  ABORT_LAST_ENTRY
-};
-
-// Information related to failed provisional loads.
-struct FailedProvisionalLoadInfo {
-  FailedProvisionalLoadInfo(base::TimeDelta interval, net::Error error);
-  ~FailedProvisionalLoadInfo();
-
-  base::TimeDelta time_to_failed_provisional_load;
-  net::Error error;
-};
-
-struct 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);
-
-  PageLoadExtraInfo(const PageLoadExtraInfo& other);
-
-  ~PageLoadExtraInfo();
-
-  // The first time that the page was backgrounded since the navigation started.
-  const base::Optional<base::TimeDelta> first_background_time;
-
-  // The first time that the page was foregrounded since the navigation started.
-  const base::Optional<base::TimeDelta> first_foreground_time;
-
-  // True if the page load started in the foreground.
-  const bool started_in_foreground;
-
-  // Committed URL. If the page load did not commit, |committed_url| will be
-  // empty.
-  const GURL committed_url;
-
-  // Time from navigation start until commit.
-  const base::Optional<base::TimeDelta> time_to_commit;
-
-  // The abort time and time to abort for this page load. If the page was not
-  // aborted, |abort_type| will be |ABORT_NONE|.
-  const UserAbortType abort_type;
-  const base::Optional<base::TimeDelta> time_to_abort;
-
-  // Extra information supplied to the page load metrics system from the
-  // renderer.
-  const PageLoadMetadata metadata;
-};
-
-// Interface for PageLoadMetrics observers. All instances of this class are
-// owned by the PageLoadTracker tracking a page load.
-class PageLoadMetricsObserver {
- public:
-  virtual ~PageLoadMetricsObserver() {}
-
-  // The page load started, with the given navigation handle. Note that OnStart
-  // is called for same-page navigations. Implementers of OnStart that only want
-  // to process non-same-page navigations should also check to see that the page
-  // load committed via OnCommit or committed_url in
-  // PageLoadExtraInfo. currently_committed_url contains the URL of the
-  // committed page load at the time the navigation for navigation_handle was
-  // initiated, or the empty URL if there was no committed page load at the time
-  // the navigation was initiated.
-  virtual void OnStart(content::NavigationHandle* navigation_handle,
-                       const GURL& currently_committed_url,
-                       bool started_in_foreground) {}
-
-  // OnRedirect is triggered when a page load redirects to another URL.
-  // The navigation handle holds relevant data for the navigation, but will
-  // be destroyed soon after this call. Don't hold a reference to it. This can
-  // be called multiple times.
-  virtual void OnRedirect(content::NavigationHandle* navigation_handle) {}
-
-  // OnCommit is triggered when a page load commits, i.e. when we receive the
-  // first data for the request. The navigation handle holds relevant data for
-  // the navigation, but will be destroyed soon after this call. Don't hold a
-  // reference to it.
-  // Note that this does not get called for same page navigations.
-  virtual void OnCommit(content::NavigationHandle* navigation_handle) {}
-
-  // OnHidden is triggered when a page leaves the foreground. It does not fire
-  // when a foreground page is permanently closed; for that, listen to
-  // OnComplete instead.
-  virtual void OnHidden() {}
-
-  // OnShown is triggered when a page is brought to the foreground. It does not
-  // fire when the page first loads; for that, listen for OnStart instead.
-  virtual void OnShown() {}
-
-  // The callbacks below are only invoked after a navigation commits, for
-  // tracked page loads. Page loads that don't meet the criteria for being
-  // tracked at the time a navigation commits will not receive any of the
-  // callbacks below.
-
-  // OnTimingUpdate is triggered when an updated PageLoadTiming is
-  // available. This method may be called multiple times over the course of the
-  // page load. This method is currently only intended for use in testing. Most
-  // implementers should implement one of the On* callbacks, such as
-  // OnFirstContentfulPaint or OnDomContentLoadedEventStart. Please email
-  // loading-dev@chromium.org if you intend to override this method.
-  virtual void OnTimingUpdate(const PageLoadTiming& timing,
-                              const PageLoadExtraInfo& extra_info) {}
-  // OnUserInput is triggered when a new user input is passed in to
-  // web_contents. Contains a TimeDelta from navigation start.
-  virtual void OnUserInput(const blink::WebInputEvent& event) {}
-
-  // The following methods are invoked at most once, when the timing for the
-  // associated event first becomes available.
-  virtual void OnDomContentLoadedEventStart(
-      const PageLoadTiming& timing,
-      const PageLoadExtraInfo& extra_info) {}
-  virtual void OnLoadEventStart(const PageLoadTiming& timing,
-                                const PageLoadExtraInfo& extra_info) {}
-  virtual void OnFirstLayout(const PageLoadTiming& timing,
-                             const PageLoadExtraInfo& extra_info) {}
-  virtual void OnFirstPaint(const PageLoadTiming& timing,
-                            const PageLoadExtraInfo& extra_info) {}
-  virtual void OnFirstTextPaint(const PageLoadTiming& timing,
-                                const PageLoadExtraInfo& extra_info) {}
-  virtual void OnFirstImagePaint(const PageLoadTiming& timing,
-                                 const PageLoadExtraInfo& extra_info) {}
-  virtual void OnFirstContentfulPaint(const PageLoadTiming& timing,
-                                      const PageLoadExtraInfo& extra_info) {}
-  virtual void OnParseStart(const PageLoadTiming& timing,
-                            const PageLoadExtraInfo& extra_info) {}
-  virtual void OnParseStop(const PageLoadTiming& timing,
-                           const PageLoadExtraInfo& extra_info) {}
-
-  // Observer method to be invoked when there is a change in PageLoadMetadata's
-  // behavior_flags.
-  virtual void OnLoadingBehaviorObserved(
-      const page_load_metrics::PageLoadExtraInfo& extra_info) {}
-
-  // One of OnComplete or OnFailedProvisionalLoad is invoked for tracked page
-  // loads, immediately before the observer is deleted. These callbacks will not
-  // be invoked for page loads that did not meet the criteria for being tracked
-  // at the time the navigation completed. The PageLoadTiming struct contains
-  // timing data and the PageLoadExtraInfo struct contains other useful data
-  // collected over the course of the page load. Most observers should not need
-  // to implement these callbacks, and should implement the On* timing callbacks
-  // instead.
-
-  // OnComplete is invoked for tracked page loads that committed, immediately
-  // before the observer is deleted.
-  virtual void OnComplete(const PageLoadTiming& timing,
-                          const PageLoadExtraInfo& extra_info) {}
-
-  // OnFailedProvisionalLoad is invoked for tracked page loads that did not
-  // commit, immediately before the observer is deleted. Note that provisional
-  // loads that result in downloads or 204s are aborted by the system, and are
-  // also included as failed provisional loads.
-  virtual void OnFailedProvisionalLoad(
-      const FailedProvisionalLoadInfo& failed_provisional_load_info,
-      const PageLoadExtraInfo& extra_info) {}
-};
-
-}  // namespace page_load_metrics
-
-#endif  // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_OBSERVER_H_