Report page load timing information for child frames.

chrome/browser/page_load_metrics/page_load_metrics_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_UTIL_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_UTIL_H_
 
 #include "base/metrics/histogram_macros.h"
 #include "base/optional.h"
 #include "base/time/time.h"
@@ skipping 108 matching lines @@
     base::TimeTicks app_background_time);
 
 // Returns the minimum value of the optional TimeDeltas, if both values are
 // set. Otherwise, if one value is set, returns that value. Otherwise, returns
 // an unset value.
 base::Optional<base::TimeDelta> OptionalMin(
     const base::Optional<base::TimeDelta>& a,
     const base::Optional<base::TimeDelta>& b);
 
 // Whether the given loading behavior was observed in any frame (either the main
-// frame or a child frame).
+// frame or a subframe).
 bool DidObserveLoadingBehaviorInAnyFrame(
     const page_load_metrics::PageLoadExtraInfo& info,
     blink::WebLoadingBehaviorFlag behavior);
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_UTIL_H_