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

chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer_unittest.cc

 // 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.
 
 #include "chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h"
 
+#include "chrome/browser/offline_pages/offliner_user_data.h"
 #include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h"
+#include "components/offline_pages/core/background/offliner_stub.h"
 
 namespace {
 const char kFakeUrl[] = "http://www.google.com/nothingotseehere.html";
 }  // namespace
 
 namespace page_load_metrics {
 
 class ResourceTrackingPageLoadMetricsObserverTest
     : public page_load_metrics::PageLoadMetricsObserverTestHarness {
  public:
@@ skipping 29 matching lines @@
   page_load_metrics::ExtraRequestCompleteInfo done_info{
       GURL(),
       -1 /*frame_tree_node_id*/,
       false /*was_cached*/,
       1024 * 40 /* raw_body_bytes */,
       1024 * 40 /* original_network_content_length */,
       nullptr /* data reduction_proxy */,
       content::ResourceType::RESOURCE_TYPE_IMAGE,
   };
 
+  // Add some OfflinerUserData to the web_contents so that our tracker will
+  // be called.
+  offline_pages::OfflinerStub offliner_stub;
+  offline_pages::OfflinerUserData::AddToWebContents(web_contents(),
+                                                    &offliner_stub);
+
   // Start the navigation. This will create the page load tracker and register
   // the observers.
   NavigateAndCommit(GURL(kFakeUrl));
 
   // Simulate starting two images, and completing one.
   SimulateStartedResource(start_info_1);
   SimulateStartedResource(start_info_2);
   SimulateLoadedResource(done_info);
 
-  int64_t started = -1;
-  int64_t completed = -1;
-  EXPECT_NE(nullptr, observer());
-  observer()->GetCountsForTypeForTesting(
-      content::ResourceType::RESOURCE_TYPE_IMAGE, &started, &completed);
-  EXPECT_EQ(2, started);
-  EXPECT_EQ(1, completed);
+  int64_t resource_watcher_started = -1;
+  int64_t resource_watcher_completed = -1;
+  offliner_stub.GetResourcePercentageCounts(
+      offline_pages::Offliner::ResourceDataType::IMAGE,
+      &resource_watcher_started, &resource_watcher_completed);
+  EXPECT_EQ(2, resource_watcher_started);
+  EXPECT_EQ(1, resource_watcher_completed);
 }
 
 }  // namespace page_load_metrics