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 "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(
+      offline_pages::ResourceTrackerObserver* request_coordinator);
   ~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.
+  void InformObservers(const content::ResourceType type,

[RyanSturm, 2017/05/10 15:55:53]

private method?

[Pete Williamson, 2017/05/10 18:14:53]

Done.

+                       int64_t started_count,
+                       int64_t completed_count);
+
+  // 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);
 
  private:
   // 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 request_coordinator_, it will be valid for the
+  // lifetime of the PageLoadMetricsObserver.
+  offline_pages::ResourceTrackerObserver* request_coordinator_;
 };
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RESOURCE_TRACKING_PAGE_LOAD_METRICS_OBSERVER_H_