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

chrome/browser/page_load_metrics/page_load_metrics_observer.cc

 // Copyright 2015 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/page_load_metrics_observer.h"
 
 #include <utility>
 
 namespace page_load_metrics {
 
@@ skipping 38 matching lines @@
       base::Optional<base::TimeDelta>() /* first_background_time */,
       base::Optional<base::TimeDelta>() /* first_foreground_time */,
       started_in_foreground /* started_in_foreground */,
       UserInitiatedInfo::BrowserInitiated(), url, url, true /* did_commit */,
       page_load_metrics::END_NONE,
       page_load_metrics::UserInitiatedInfo::NotUserInitiated(),
       base::TimeDelta(), page_load_metrics::PageLoadMetadata(),
       page_load_metrics::PageLoadMetadata());
 }
 
-ExtraRequestInfo::ExtraRequestInfo(
+ExtraRequestCompleteInfo::ExtraRequestCompleteInfo(
     bool was_cached,
     int64_t raw_body_bytes,
     int64_t original_network_content_length,
     std::unique_ptr<data_reduction_proxy::DataReductionProxyData>
-        data_reduction_proxy_data)
+        data_reduction_proxy_data,
+    content::ResourceType detected_resource_type)
     : was_cached(was_cached),
       raw_body_bytes(raw_body_bytes),
       original_network_content_length(original_network_content_length),
-      data_reduction_proxy_data(std::move(data_reduction_proxy_data)) {}
+      data_reduction_proxy_data(std::move(data_reduction_proxy_data)),
+      resource_type(detected_resource_type) {}
 
-ExtraRequestInfo::~ExtraRequestInfo() {}
+ExtraRequestCompleteInfo::~ExtraRequestCompleteInfo() {}
+
+ExtraRequestStartInfo::ExtraRequestStartInfo(content::ResourceType found_type)
+    : resource_type(found_type) {}
+
+ExtraRequestStartInfo::ExtraRequestStartInfo(
+    const ExtraRequestStartInfo& other) = default;
+
+ExtraRequestStartInfo::~ExtraRequestStartInfo() {}
 
 FailedProvisionalLoadInfo::FailedProvisionalLoadInfo(base::TimeDelta interval,
                                                      net::Error error)
     : time_to_failed_provisional_load(interval), error(error) {}
 
 FailedProvisionalLoadInfo::~FailedProvisionalLoadInfo() {}
 
 PageLoadMetricsObserver::ObservePolicy PageLoadMetricsObserver::OnStart(
     content::NavigationHandle* navigation_handle,
     const GURL& currently_committed_url,
@@ skipping 30 matching lines @@
 
 PageLoadMetricsObserver::ObservePolicy
 PageLoadMetricsObserver::ShouldObserveMimeType(
     const std::string& mime_type) const {
   return mime_type == "text/html" || mime_type == "application/xhtml+xml"
              ? CONTINUE_OBSERVING
              : STOP_OBSERVING;
 }
 
 }  // namespace page_load_metrics