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1 // Copyright 2017 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 #include "chrome/browser/metrics/browser_window_histogram_helper.h" | |
6 | |
7 #include "components/startup_metric_utils/browser/startup_metric_utils.h" | |
8 #include "ui/compositor/compositor.h" | |
9 | |
10 BrowserWindowHistogramHelper::BrowserWindowHistogramHelper( | |
sky
2017/04/19 20:05:08
Style guide says positions of definition and decla
themblsha
2017/04/20 10:42:23
Done, thanks. Would be nice to have an automated c
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11 ui::Compositor* compositor) | |
12 : scoped_observer_(this) { | |
13 startup_metric_utils::RecordBrowserWindowFirstPaint(base::TimeTicks::Now()); | |
14 | |
15 #if defined(OS_MACOSX) | |
16 if (!compositor) { | |
17 // In Cocoa version of Chromium, UI is rendered inside the main process | |
18 // using CoreAnimation compositor, and at this point everything is already | |
19 // visible to the user. | |
20 startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( | |
21 base::TimeTicks::Now()); | |
22 return; | |
23 } | |
24 #endif // OS_MACOSX | |
25 | |
26 scoped_observer_.Add(compositor); | |
27 } | |
28 | |
29 BrowserWindowHistogramHelper::~BrowserWindowHistogramHelper() {} | |
30 | |
31 // static | |
32 std::unique_ptr<BrowserWindowHistogramHelper> | |
33 BrowserWindowHistogramHelper::MaybeRecordValueAndCreateInstanceOnBrowserPaint( | |
34 ui::Compositor* compositor) { | |
35 static bool did_first_paint = false; | |
36 if (did_first_paint) | |
37 return std::unique_ptr<BrowserWindowHistogramHelper>(); | |
38 | |
39 did_first_paint = true; | |
40 | |
41 return std::unique_ptr<BrowserWindowHistogramHelper>( | |
42 new BrowserWindowHistogramHelper(compositor)); | |
43 } | |
44 | |
45 // OnCompositingEnded was removed crbug.com/671202, this is the next best thing. | |
46 void BrowserWindowHistogramHelper::OnCompositingStarted( | |
47 ui::Compositor* compositor, | |
48 base::TimeTicks start_time) { | |
49 startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( | |
50 base::TimeTicks::Now()); | |
51 | |
52 scoped_observer_.RemoveAll(); | |
53 } | |
54 | |
55 void BrowserWindowHistogramHelper::OnCompositingShuttingDown( | |
56 ui::Compositor* compositor) { | |
57 scoped_observer_.RemoveAll(); | |
58 } | |
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