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

chrome/browser/page_load_metrics/observers/media_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/media_page_load_metrics_observer.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 36 matching lines @@
   void SimulatePageLoad(bool simulate_play_media,
                         bool simulate_app_background) {
     NavigateAndCommit(GURL(kDefaultTestUrl));
 
     if (simulate_play_media)
       SimulateMediaPlayed();
 
     SimulateTimingUpdate(timing_);
 
     // Prepare 4 resources of varying size and configurations.
-    page_load_metrics::ExtraRequestInfo resources[] = {
+    page_load_metrics::ExtraRequestCompleteInfo resources[] = {
         // Cached request.
         {true /*was_cached*/, 1024 * 40 /* raw_body_bytes */,
          0 /* original_network_content_length */,
-         nullptr /* data_reduction_proxy_data */},
+         nullptr /* data_reduction_proxy_data */,
+         content::ResourceType::RESOURCE_TYPE_MAIN_FRAME},
         // Uncached non-proxied request.
         {false /*was_cached*/, 1024 * 40 /* raw_body_bytes */,
          1024 * 40 /* original_network_content_length */,
-         nullptr /* data_reduction_proxy_data */},
+         nullptr /* data_reduction_proxy_data */,
+         content::ResourceType::RESOURCE_TYPE_MAIN_FRAME},
         // Uncached proxied request with .1 compression ratio.
         {false /*was_cached*/, 1024 * 40 /* raw_body_bytes */,
          1024 * 40 /* original_network_content_length */,
-         nullptr /* data_reduction_proxy_data */},
+         nullptr /* data_reduction_proxy_data */,
+         content::ResourceType::RESOURCE_TYPE_MAIN_FRAME},
         // Uncached proxied request with .5 compression ratio.
         {false /*was_cached*/, 1024 * 40 /* raw_body_bytes */,
          1024 * 40 /* original_network_content_length */,
-         nullptr /* data_reduction_proxy_data */},
+         nullptr /* data_reduction_proxy_data */,
+         content::ResourceType::RESOURCE_TYPE_MAIN_FRAME},
     };
 
     for (const auto& request : resources) {
       SimulateLoadedResource(request);
       if (!request.was_cached) {
         network_bytes_ += request.raw_body_bytes;
       } else {
         cache_bytes_ += request.raw_body_bytes;
       }
     }
@@ skipping 58 matching lines @@
   SimulatePageLoad(false /* simulate_play_media */,
                    false /* simulate_app_background */);
 
   histogram_tester().ExpectTotalCount(
       "PageLoad.Clients.MediaPageLoad.Experimental.Bytes.Network", 0);
   histogram_tester().ExpectTotalCount(
       "PageLoad.Clients.MediaPageLoad.Experimental.Bytes.Cache", 0);
   histogram_tester().ExpectTotalCount(
       "PageLoad.Clients.MediaPageLoad.Experimental.Bytes.Total", 0);
 }