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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 #ifndef COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ | 5 #ifndef COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ |
6 #define COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ | 6 #define COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/callback.h" | 11 #include "base/callback.h" |
12 #include "base/macros.h" | 12 #include "base/macros.h" |
13 #include "components/metrics/metrics_provider.h" | 13 #include "components/metrics/metrics_provider.h" |
14 | 14 |
15 namespace syncer { | 15 namespace sync_driver { |
16 | 16 |
17 class DeviceInfoTracker; | 17 class DeviceInfoTracker; |
18 | 18 |
19 // A registerable metrics provider that will emit the number of active syncing | 19 // A registerable metrics provider that will emit the number of active syncing |
20 // devices a user has upon UMA upload. When there are multiple active profiles | 20 // devices a user has upon UMA upload. When there are multiple active profiles |
21 // that are aware of syncable devices, the largest count is used. This approach | 21 // that are aware of syncable devices, the largest count is used. This approach |
22 // is useful for several reasons. We're significantly interested in "power" | 22 // is useful for several reasons. We're significantly interested in "power" |
23 // users that have multiple devices and profiles, and if we skipped emitting any | 23 // users that have multiple devices and profiles, and if we skipped emitting any |
24 // metrics in multi profile cases, then we'd be unaware of this entire segment | 24 // metrics in multi profile cases, then we'd be unaware of this entire segment |
25 // of the population. If we emitted multiple metrics, we would have much more | 25 // of the population. If we emitted multiple metrics, we would have much more |
26 // noise and discerning which metrics actually belonged to non-syncing users | 26 // noise and discerning which metrics actually belonged to non-syncing users |
27 // would be much trickier. | 27 // would be much trickier. |
28 class DeviceCountMetricsProvider : public metrics::MetricsProvider { | 28 class DeviceCountMetricsProvider : public metrics::MetricsProvider { |
29 public: | 29 public: |
30 typedef base::Callback<void(std::vector<const DeviceInfoTracker*>* trackers)> | 30 typedef base::Callback<void( |
| 31 std::vector<const sync_driver::DeviceInfoTracker*>* trackers)> |
31 ProvideTrackersCallback; | 32 ProvideTrackersCallback; |
32 | 33 |
33 explicit DeviceCountMetricsProvider( | 34 explicit DeviceCountMetricsProvider( |
34 const ProvideTrackersCallback& provide_trackers); | 35 const ProvideTrackersCallback& provide_trackers); |
35 ~DeviceCountMetricsProvider() override; | 36 ~DeviceCountMetricsProvider() override; |
36 | 37 |
37 // MetricsProvider: | 38 // MetricsProvider: |
38 void ProvideGeneralMetrics( | 39 void ProvideGeneralMetrics( |
39 metrics::ChromeUserMetricsExtension* uma_proto) override; | 40 metrics::ChromeUserMetricsExtension* uma_proto) override; |
40 | 41 |
41 private: | 42 private: |
42 // Returns the max number of active devices across all accounts. | 43 // Returns the max number of active devices across all accounts. |
43 int MaxActiveDeviceCount() const; | 44 int MaxActiveDeviceCount() const; |
44 | 45 |
45 const ProvideTrackersCallback provide_trackers_; | 46 const ProvideTrackersCallback provide_trackers_; |
46 | 47 |
47 DISALLOW_COPY_AND_ASSIGN(DeviceCountMetricsProvider); | 48 DISALLOW_COPY_AND_ASSIGN(DeviceCountMetricsProvider); |
48 }; | 49 }; |
49 | 50 |
50 } // namespace syncer | 51 } // namespace sync_driver |
51 | 52 |
52 #endif // COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ | 53 #endif // COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_ |
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