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Side by Side Diff: components/page_load_metrics/browser/page_load_metrics_util.h

Issue 2177743002: Migrate page_load_metrics out of components. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: migrate page_load_metrics_messages to common message generator Created 4 years, 4 months ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_
6 #define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_
7
8 #include "base/metrics/histogram_macros.h"
9 #include "base/optional.h"
10 #include "base/time/time.h"
11
12 #define PAGE_LOAD_HISTOGRAM(name, sample) \
13 UMA_HISTOGRAM_CUSTOM_TIMES(name, sample, \
14 base::TimeDelta::FromMilliseconds(10), \
15 base::TimeDelta::FromMinutes(10), 100)
16
17 namespace page_load_metrics {
18
19 struct PageLoadExtraInfo;
20 struct PageLoadTiming;
21
22 // Returns true if:
23 // - We have timing information for the event.
24 // - The page load started while the page was in the foreground.
25 // - The event occurred prior to the page being moved to the background.
26 // When a page is backgrounded, some events (e.g. paint) are delayed. Since
27 // these data points can skew the mean, they should not be mixed with timing
28 // events that occurred in the foreground.
29 // If the event time delta and background time delta are equal, we still
30 // consider the event to be logged in the foreground histogram since any
31 // background specific handling would not yet have been applied to that event.
32 bool WasStartedInForegroundOptionalEventInForeground(
33 const base::Optional<base::TimeDelta>& event,
34 const PageLoadExtraInfo& info);
35
36 // Returns true if:
37 // - Parse started and did not complete but the entire page load duration
38 // happened in the foreground.
39 // - Parse completed and happened entirely in the foreground.
40 bool WasParseInForeground(const base::Optional<base::TimeDelta>& parse_start,
41 const base::Optional<base::TimeDelta>& parse_stop,
42 const PageLoadExtraInfo& info);
43 } // namespace page_load_metrics
44
45 #endif // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_
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