Report page load timing information for child frames.

chrome/browser/page_load_metrics/page_load_tracker.h

 // Copyright 2016 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 CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_TRACKER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_TRACKER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 204 matching lines @@
   // metrics as the application goes into the background. The application may be
   // killed at any time after this method is invoked without further
   // notification.
   void FlushMetricsOnAppEnterBackground();
 
   void NotifyClientRedirectTo(const PageLoadTracker& destination);
 
   void UpdateTiming(const PageLoadTiming& timing,
                     const PageLoadMetadata& metadata);
 
+  void UpdateSubFrameTiming(content::RenderFrameHost* render_frame_host,
+                            const PageLoadTiming& new_timing,
+                            const PageLoadMetadata& new_metadata);
+
   // Update metadata for child frames. Updates for child frames arrive
   // separately from updates for the main frame, so aren't included in
   // UpdateTiming.
-  void UpdateChildFrameMetadata(const PageLoadMetadata& child_metadata);
+  void UpdateSubFrameMetadata(const PageLoadMetadata& child_metadata);
 
   void OnStartedResource(
       const ExtraRequestStartInfo& extra_request_started_info);
 
   void OnLoadedResource(
       const ExtraRequestCompleteInfo& extra_request_complete_info);
 
   // Signals that we should stop tracking metrics for the associated page load.
   // We may stop tracking a page load if it doesn't meet the criteria for
   // tracking metrics in DidFinishNavigation.
@@ skipping 60 matching lines @@
       const content::WebContentsObserver::MediaPlayerInfo& video_type,
       bool is_in_main_frame);
 
   // Invoked on navigations where a navigation delay was added by the
   // DelayNavigationThrottle. This is a temporary method that will be removed
   // once the experiment is complete.
   void OnNavigationDelayComplete(base::TimeDelta scheduled_delay,
                                  base::TimeDelta actual_delay);
 
  private:
+  typedef int FrameTreeNodeId;
+
   // This function converts a TimeTicks value taken in the browser process
   // to navigation_start_ if:
   // - base::TimeTicks is not comparable across processes because the clock
   // is not system wide monotonic.
   // - *event_time < navigation_start_
   void ClampBrowserTimestampIfInterProcessTimeTickSkew(
       base::TimeTicks* event_time);
 
   void UpdatePageEndInternal(PageEndReason page_end_reason,
                              UserInitiatedInfo user_initiated_info,
@@ skipping 77 matching lines @@
 
   // This member counts consecutive provisional aborts that share a url. It will
   // always be less than or equal to |aborted_chain_size_|.
   const int aborted_chain_size_same_url_;
 
   // Interface to chrome features. Must outlive the class.
   PageLoadMetricsEmbedderInterface* const embedder_interface_;
 
   std::vector<std::unique_ptr<PageLoadMetricsObserver>> observers_;
 
+  // Navigation start offsets for the most recently committed document in each
+  // frame.
+  std::map<FrameTreeNodeId, base::TimeDelta> child_frame_navigation_start_;
+
   DISALLOW_COPY_AND_ASSIGN(PageLoadTracker);
 };
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_TRACKER_H_