| // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ |
| #define CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ |
| |
| #include "base/callback.h" |
| #include "base/task_runner.h" |
| #include "base/time/time.h" |
| #include "content/common/content_export.h" |
| |
| namespace content { |
| |
| // Fetch histogram data asynchronously from the various child processes, into |
| // the browser process. This method is used by the metrics services in |
| // preparation for a log upload. It contacts all processes, and get them to |
| // upload to the browser any/all changes to histograms. When all changes have |
| // been acquired, or when the wait time expires (whichever is sooner), post the |
| // callback to the specified TaskRunner. Note the callback is posted exactly |
| // once. |
| CONTENT_EXPORT void FetchHistogramsAsynchronously( |
| scoped_refptr<base::TaskRunner> task_runner, |
| const base::Closure& callback, |
| base::TimeDelta wait_time); |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ |
