Send an event to the page load metrics to track resource starting.

chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h

 // 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 CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_CORE_PAGE_LOAD_METRICS_OBSERVER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_CORE_PAGE_LOAD_METRICS_OBSERVER_H_
 
 #include "chrome/browser/page_load_metrics/page_load_metrics_observer.h"
 
 namespace internal {
@@ skipping 115 matching lines @@
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
   void OnComplete(const page_load_metrics::PageLoadTiming& timing,
                   const page_load_metrics::PageLoadExtraInfo& info) override;
   void OnFailedProvisionalLoad(
       const page_load_metrics::FailedProvisionalLoadInfo& failed_load_info,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
   ObservePolicy FlushMetricsOnAppEnterBackground(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& info) override;
   void OnUserInput(const blink::WebInputEvent& event) override;
-  void OnLoadedResource(
-      const page_load_metrics::ExtraRequestInfo& extra_request_info) override;
+  void OnLoadedResource(const page_load_metrics::ExtraRequestCompleteInfo&
+                            extra_request_complete_info) override;
 
  private:
   void RecordTimingHistograms(const page_load_metrics::PageLoadTiming& timing,
                               const page_load_metrics::PageLoadExtraInfo& info);
   void RecordByteAndResourceHistograms(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& info);
   void RecordRappor(const page_load_metrics::PageLoadTiming& timing,
                     const page_load_metrics::PageLoadExtraInfo& info);
   void RecordForegroundDurationHistograms(
@@ skipping 25 matching lines @@
   // True if we've received a scroll input after first paint has happened.
   bool received_scroll_input_after_first_paint_ = false;
 
   base::TimeTicks first_user_interaction_after_first_paint_;
   base::TimeTicks first_paint_;
 
   DISALLOW_COPY_AND_ASSIGN(CorePageLoadMetricsObserver);
 };
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_CORE_PAGE_LOAD_METRICS_OBSERVER_H_