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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() {} |
| 11 |
| 12 // static |
| 13 std::unique_ptr<BrowserWindowHistogramHelper> |
| 14 BrowserWindowHistogramHelper::MaybeRecordValueAndCreateInstanceOnBrowserPaint( |
| 15 ui::Compositor* compositor) { |
| 16 static bool did_first_paint = false; |
| 17 if (did_first_paint) |
| 18 return std::unique_ptr<BrowserWindowHistogramHelper>(); |
| 19 |
| 20 did_first_paint = true; |
| 21 |
| 22 return std::unique_ptr<BrowserWindowHistogramHelper>( |
| 23 new BrowserWindowHistogramHelper(compositor)); |
| 24 } |
| 25 |
| 26 BrowserWindowHistogramHelper::BrowserWindowHistogramHelper( |
| 27 ui::Compositor* compositor) |
| 28 : scoped_observer_(this) { |
| 29 startup_metric_utils::RecordBrowserWindowFirstPaint(base::TimeTicks::Now()); |
| 30 |
| 31 #if defined(OS_MACOSX) |
| 32 if (!compositor) { |
| 33 // In Cocoa version of Chromium, UI is rendered inside the main process |
| 34 // using CoreAnimation compositor, and at this point everything is already |
| 35 // visible to the user. |
| 36 startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( |
| 37 base::TimeTicks::Now()); |
| 38 return; |
| 39 } |
| 40 #endif // OS_MACOSX |
| 41 |
| 42 scoped_observer_.Add(compositor); |
| 43 } |
| 44 |
| 45 void BrowserWindowHistogramHelper::OnCompositingEnded( |
| 46 ui::Compositor* compositor) { |
| 47 startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( |
| 48 base::TimeTicks::Now()); |
| 49 |
| 50 scoped_observer_.RemoveAll(); |
| 51 } |
| 52 |
| 53 void BrowserWindowHistogramHelper::OnCompositingShuttingDown( |
| 54 ui::Compositor* compositor) { |
| 55 scoped_observer_.RemoveAll(); |
| 56 } |
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