Add support for tracking loading behavior of child frames.

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"
 
 namespace page_load_metrics {
 
 PageLoadExtraInfo::PageLoadExtraInfo(
     base::TimeTicks navigation_start,
     const base::Optional<base::TimeDelta>& first_background_time,
     const base::Optional<base::TimeDelta>& first_foreground_time,
     bool started_in_foreground,
     UserInitiatedInfo user_initiated_info,
     const GURL& url,
     const GURL& start_url,
     bool did_commit,
     PageEndReason page_end_reason,
     UserInitiatedInfo page_end_user_initiated_info,
     const base::Optional<base::TimeDelta>& page_end_time,
-    const PageLoadMetadata& metadata)
+    const PageLoadMetadata& main_frame_metadata,
+    const PageLoadMetadata& child_frame_metadata)
     : navigation_start(navigation_start),
       first_background_time(first_background_time),
       first_foreground_time(first_foreground_time),
       started_in_foreground(started_in_foreground),
       user_initiated_info(user_initiated_info),
       url(url),
       start_url(start_url),
       did_commit(did_commit),
       page_end_reason(page_end_reason),
       page_end_user_initiated_info(page_end_user_initiated_info),
       page_end_time(page_end_time),
-      metadata(metadata) {}
+      main_frame_metadata(main_frame_metadata),
+      child_frame_metadata(child_frame_metadata) {}
 
 PageLoadExtraInfo::PageLoadExtraInfo(const PageLoadExtraInfo& other) = default;
 
 PageLoadExtraInfo::~PageLoadExtraInfo() {}
 
 // static
 PageLoadExtraInfo PageLoadExtraInfo::CreateForTesting(
     const GURL& url,
     bool started_in_foreground) {
   return PageLoadExtraInfo(
       base::TimeTicks::Now() /* navigation_start */,
       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());
+      base::TimeDelta(), page_load_metrics::PageLoadMetadata(),
+      page_load_metrics::PageLoadMetadata());
 }
 
 ExtraRequestInfo::ExtraRequestInfo(bool was_cached,
                                    int64_t raw_body_bytes,
                                    bool data_reduction_proxy_used,
                                    int64_t original_network_content_length)
     : was_cached(was_cached),
       raw_body_bytes(raw_body_bytes),
       data_reduction_proxy_used(data_reduction_proxy_used),
       original_network_content_length(original_network_content_length) {}
@@ skipping 44 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