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

Index: chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h
index 58e8d87861dccc8e9159af34fcad3797443fa0d7..0d9079d13f3fc70f715c1afab32ed0218d819e28 100644
--- a/chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h
@@ -8,13 +8,19 @@
 #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
@@ -29,19 +35,23 @@ class ResourceTrackingPageLoadMetricsObserver
   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 InformObservers(const content::ResourceType type,

[Dmitry Titov, 2017/05/18 02:28:10]

Since there is only one 'observer', perhaps it's more clear to call it 'client',
and also rename:
offline_pages::ResourceTrackerObserver -> offline_pages::ResourceTrackerClient?

This way, there is no clash with 'Observers" pattern which assumes multiple
observers.

[Bryan McQuade, 2017/05/23 05:00:01]

Agree - given that the containing class is also itself a
PageLoadMetricsObserver, I think using Client here will help to distinguish.

[Pete Williamson, 2017/05/24 01:01:50]

Renamed this function to InformClient.

We can safely remove the ResourceTrackerObserver class, since Dimich pointed out
that we can use the interface directly on the offliner, so I removed that class
and all references to it instead of renaming it.

+                       int64_t started_count,
+                       int64_t completed_count);
+
   // 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.
+  offline_pages::ResourceTrackerObserver* request_coordinator_;
 };
 
 }  // namespace page_load_metrics