| // Copyright 2018 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_METRICS_LIVE_TAB_COUNT_METRICS_H_ |
| #define CHROME_BROWSER_METRICS_LIVE_TAB_COUNT_METRICS_H_ |
| |
| #include <stddef.h> |
| |
| // This contains functions for creating live tab count metrics that are specific |
| // to //chrome/browser. All bucket-related and process-independent code should |
| // live in //components/live_tab_count_metrics. |
| namespace live_tab_count_metrics { |
| |
| // Returns the current number of live tabs in the browser. A tab is considered |
| // to be alive if it is associated with the tab UI (i.e. tabstrip), and it is |
| // either loading or loaded. This excludes crashed or discarded tabs. |
| // |
| // Must be called on the UI thread. This function is implemented using |
| // TabLoadTracker, and so it is subject to TabLoadTracker's threading rules. |
| // Accessing TabLoadTracker must be done from the sequence to which it is bound, |
| // which is meant to be the UI thread. |
| size_t LiveTabCount(); |
| |
| } // namespace live_tab_count_metrics |
| |
| #endif // CHROME_BROWSER_METRICS_LIVE_TAB_COUNT_METRICS_H_ |
