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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ | 5 #ifndef EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ |
| 6 #define EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ | 6 #define EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ |
| 7 | 7 |
| 8 #include <queue> | 8 #include <queue> |
| 9 | 9 |
| 10 #include "base/bind.h" | 10 #include "base/bind.h" |
| 11 #include "base/callback.h" | 11 #include "base/callback.h" |
| 12 #include "base/macros.h" |
| 12 #include "base/memory/ref_counted.h" | 13 #include "base/memory/ref_counted.h" |
| 13 #include "base/threading/sequenced_worker_pool.h" | 14 #include "base/threading/sequenced_worker_pool.h" |
| 14 | 15 |
| 15 namespace extensions { | 16 namespace extensions { |
| 16 | 17 |
| 17 // An abstract base class for all kinds of system information providers. Each | 18 // An abstract base class for all kinds of system information providers. Each |
| 18 // kind of SystemInfoProvider is a single shared instance. It is created if | 19 // kind of SystemInfoProvider is a single shared instance. It is created if |
| 19 // needed, and destroyed at exit time. This is done via LazyInstance and | 20 // needed, and destroyed at exit time. This is done via LazyInstance and |
| 20 // scoped_refptr. | 21 // scoped_refptr. |
| 21 // | 22 // |
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| 89 // Sequenced worker pool to make the operation of querying information get | 90 // Sequenced worker pool to make the operation of querying information get |
| 90 // executed in order. | 91 // executed in order. |
| 91 scoped_refptr<base::SequencedTaskRunner> worker_pool_; | 92 scoped_refptr<base::SequencedTaskRunner> worker_pool_; |
| 92 | 93 |
| 93 DISALLOW_COPY_AND_ASSIGN(SystemInfoProvider); | 94 DISALLOW_COPY_AND_ASSIGN(SystemInfoProvider); |
| 94 }; | 95 }; |
| 95 | 96 |
| 96 } // namespace extensions | 97 } // namespace extensions |
| 97 | 98 |
| 98 #endif // EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ | 99 #endif // EXTENSIONS_BROWSER_API_SYSTEM_INFO_SYSTEM_INFO_PROVIDER_H_ |
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