Report page load timing information for child frames.

chrome/browser/page_load_metrics/observers/ads_page_load_metrics_observer.h

 // Copyright 2017 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_OBSERVERS_ADS_PAGE_LOAD_METRICS_OBSERVER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_ADS_PAGE_LOAD_METRICS_OBSERVER_H_
 
 #include <list>
 #include <map>
 #include <memory>
@@ skipping 18 matching lines @@
       content::NavigationHandle* navigation_handle) override;
   ObservePolicy FlushMetricsOnAppEnterBackground(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
   void OnLoadedResource(const page_load_metrics::ExtraRequestCompleteInfo&
                             extra_request_info) override;
   void OnComplete(const page_load_metrics::PageLoadTiming& timing,
                   const page_load_metrics::PageLoadExtraInfo& info) override;
 
  private:
-  using FrameTreeNodeId = int;
-
   struct AdFrameData {
     explicit AdFrameData(FrameTreeNodeId frame_tree_node_id);
     size_t frame_bytes;
     size_t frame_bytes_uncached;
     const FrameTreeNodeId frame_tree_node_id;
   };
 
   void ProcessLoadedResource(
       const page_load_metrics::ExtraRequestCompleteInfo& extra_request_info);
   void RecordHistograms();
@@ skipping 22 matching lines @@
 
   size_t page_bytes_ = 0u;
   size_t uncached_page_bytes_ = 0u;
   int top_level_subframe_count_ = 0;
   int top_level_ad_frame_count_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(AdsPageLoadMetricsObserver);
 };
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_ADS_PAGE_LOAD_METRICS_OBSERVER_H_