Add a way to send the resource percentage signal to the RC.

chrome/browser/page_load_metrics/observers/resource_tracking_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_RESOURCE_TRACKING_PAGE_LOAD_METRICS_OBSERVER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RESOURCE_TRACKING_PAGE_LOAD_METRICS_OBSERVER_H_
 
 #include <stdint.h>
 
 #include "chrome/browser/page_load_metrics/page_load_metrics_observer.h"
+#include "components/offline_pages/core/background/offliner.h"
+#include "content/public/common/resource_type.h"
+
+namespace offline_pages {
+class ResourceTrackerObserver;
+}
 
 namespace page_load_metrics {
 
 class ResourceTrackingPageLoadMetricsObserver
     : public page_load_metrics::PageLoadMetricsObserver {
  public:
   ResourceTrackingPageLoadMetricsObserver();
   ~ResourceTrackingPageLoadMetricsObserver() override;
 
   // Called by the PageLoadMetrics framework when we start a new request, so we
   // can update our data structures to be able to calculate a resource done
   // percentage.
   void OnStartedResource(
       const ExtraRequestStartInfo& extra_request_start_info) override;
 
   // Called by the PageLoadMetrics framework when we start a new request, so we
   // can update our data structures to be able to calculate a resource done
   // percentage.
   void OnLoadedResource(
       const ExtraRequestCompleteInfo& extra_request_complete_info) override;
 
-  // For the specified type, get the count of requests started and completed.
-  // TODO(petewil) Note that type is not used yet, code to use it is coming
-  // soon.
-  void GetCountsForTypeForTesting(const content::ResourceType type,
-                                  int64_t* started_count,
-                                  int64_t* completed_count);
+  // Called when the page load commits, we return STOP_OBSERVING if the page is
+  // not part of an offlining attempt.
+  ObservePolicy OnCommit(content::NavigationHandle* navigation_handle) override;
 
  private:
+  void InformClient(const content::ResourceType type);
+
   // TODO(petewil): Some way to keep track of what we've seen
   // TODO(petewil): Some way to inform our keeper of aggregate results when they
   // change.
   int64_t started_count_;
   int64_t completed_count_;
+  // Unowned pointer to the ResourceTrackerObserver for this profile, it must be
+  // kept valid by the caller for the lifetime of the PageLoadMetricsObserver.

[Dmitry Titov, 2017/05/24 23:09:35]

It is hard to say if "must be kept valid" requirement is already enforced
somehow or not. Would a weak ref work here? Our offliners have
WeakRefFactories...

+  offline_pages::Offliner* offliner_;
 };
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RESOURCE_TRACKING_PAGE_LOAD_METRICS_OBSERVER_H_