| // Copyright 2017 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/metrics/browser_window_histogram_helper.h" |
| |
| #include "components/startup_metric_utils/browser/startup_metric_utils.h" |
| #include "ui/compositor/compositor.h" |
| |
| BrowserWindowHistogramHelper::~BrowserWindowHistogramHelper() {} |
| |
| // static |
| std::unique_ptr<BrowserWindowHistogramHelper> |
| BrowserWindowHistogramHelper::MaybeRecordValueAndCreateInstanceOnBrowserPaint( |
| ui::Compositor* compositor) { |
| static bool did_first_paint = false; |
| if (did_first_paint) |
| return nullptr; |
| |
| did_first_paint = true; |
| |
| return std::unique_ptr<BrowserWindowHistogramHelper>( |
| new BrowserWindowHistogramHelper(compositor)); |
| } |
| |
| BrowserWindowHistogramHelper::BrowserWindowHistogramHelper( |
| ui::Compositor* compositor) |
| : scoped_observer_(this) { |
| startup_metric_utils::RecordBrowserWindowFirstPaint(base::TimeTicks::Now()); |
| |
| #if defined(OS_MACOSX) |
| if (!compositor) { |
| // In Cocoa version of Chromium, UI is rendered inside the main process |
| // using CoreAnimation compositor, and at this point everything is already |
| // visible to the user. |
| startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( |
| base::TimeTicks::Now()); |
| return; |
| } |
| #endif // OS_MACOSX |
| |
| scoped_observer_.Add(compositor); |
| } |
| |
| void BrowserWindowHistogramHelper::OnCompositingEnded( |
| ui::Compositor* compositor) { |
| startup_metric_utils::RecordBrowserWindowFirstPaintCompositingEnded( |
| base::TimeTicks::Now()); |
| |
| scoped_observer_.RemoveAll(); |
| } |
| |
| void BrowserWindowHistogramHelper::OnCompositingShuttingDown( |
| ui::Compositor* compositor) { |
| scoped_observer_.RemoveAll(); |
| } |