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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 //------------------------------------------------------------------------------ | 5 //------------------------------------------------------------------------------ |
6 // Description of the life cycle of a instance of MetricsService. | 6 // Description of the life cycle of a instance of MetricsService. |
7 // | 7 // |
8 // OVERVIEW | 8 // OVERVIEW |
9 // | 9 // |
10 // A MetricsService instance is typically created at application startup. It | 10 // A MetricsService instance is typically created at application startup. It |
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894 // like to record: the histogram of memory usage, so we spawn a task to | 894 // like to record: the histogram of memory usage, so we spawn a task to |
895 // collect the memory details and when that task is finished, it will call | 895 // collect the memory details and when that task is finished, it will call |
896 // OnMemoryDetailCollectionDone, which will call HistogramSynchronization to | 896 // OnMemoryDetailCollectionDone, which will call HistogramSynchronization to |
897 // collect histograms from all renderers and then we will call | 897 // collect histograms from all renderers and then we will call |
898 // OnHistogramSynchronizationDone to continue processing. | 898 // OnHistogramSynchronizationDone to continue processing. |
899 | 899 |
900 // Create a callback_task for OnHistogramSynchronizationDone. | 900 // Create a callback_task for OnHistogramSynchronizationDone. |
901 Task* callback_task = log_sender_factory_.NewRunnableMethod( | 901 Task* callback_task = log_sender_factory_.NewRunnableMethod( |
902 &MetricsService::OnHistogramSynchronizationDone); | 902 &MetricsService::OnHistogramSynchronizationDone); |
903 | 903 |
| 904 base::StatisticsRecorder::CollectHistogramStats("Browser"); |
| 905 |
904 // Set up the callback to task to call after we receive histograms from all | 906 // Set up the callback to task to call after we receive histograms from all |
905 // renderer processes. Wait time specifies how long to wait before absolutely | 907 // renderer processes. Wait time specifies how long to wait before absolutely |
906 // calling us back on the task. | 908 // calling us back on the task. |
907 HistogramSynchronizer::FetchRendererHistogramsAsynchronously( | 909 HistogramSynchronizer::FetchRendererHistogramsAsynchronously( |
908 MessageLoop::current(), callback_task, | 910 MessageLoop::current(), callback_task, |
909 kMaxHistogramGatheringWaitDuration); | 911 kMaxHistogramGatheringWaitDuration); |
910 } | 912 } |
911 | 913 |
912 void MetricsService::OnHistogramSynchronizationDone() { | 914 void MetricsService::OnHistogramSynchronizationDone() { |
913 DCHECK(IsSingleThreaded()); | 915 DCHECK(IsSingleThreaded()); |
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1542 if (local_state) { | 1544 if (local_state) { |
1543 const PrefService::Preference* uma_pref = | 1545 const PrefService::Preference* uma_pref = |
1544 local_state->FindPreference(prefs::kMetricsReportingEnabled); | 1546 local_state->FindPreference(prefs::kMetricsReportingEnabled); |
1545 if (uma_pref) { | 1547 if (uma_pref) { |
1546 bool success = uma_pref->GetValue()->GetAsBoolean(&result); | 1548 bool success = uma_pref->GetValue()->GetAsBoolean(&result); |
1547 DCHECK(success); | 1549 DCHECK(success); |
1548 } | 1550 } |
1549 } | 1551 } |
1550 return result; | 1552 return result; |
1551 } | 1553 } |
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