components/variations/variations_service_client.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_VARIATIONS_VARIATIONS_SERVICE_CLIENT_H_
   6 #define COMPONENTS_VARIATIONS_VARIATIONS_SERVICE_CLIENT_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/version.h"
  12
  13 namespace base {
  14 class SequencedWorkerPool;
  15 }
  16
  17 namespace net {
  18 class URLRequestContextGetter;
  19 }
  20
  21 namespace network_time {
  22 class NetworkTimeTracker;
  23 }
  24
  25 namespace chrome_variations {
  26
  27 // An abstraction of operations that depend on the embedder's (e.g. Chrome)
  28 // environment.
  29 class VariationsServiceClient {
  30  public:
  31   virtual ~VariationsServiceClient() {}
  32
  33   // Returns the current application locale (e.g. "en-US").
  34   virtual std::string GetApplicationLocale() = 0;
  35
  36   // Returns the SequencedWorkerPool on which the VariationsService should run
  37   // tasks that may block.
  38   virtual base::SequencedWorkerPool* GetBlockingPool() = 0;
  39
  40   // Returns a callback that when run returns the base::Version to use for
  41   // variations seed simulation. VariationsService guarantees that the callback
  42   // will be run on the pool returned by
  43   // VariationsServiceClient::GetBlockingPool().
  44   virtual base::Callback<base::Version(void)>
  45   GetVersionForSimulationCallback() = 0;
  46
  47   virtual net::URLRequestContextGetter* GetURLRequestContext() = 0;
  48   virtual network_time::NetworkTimeTracker* GetNetworkTimeTracker() = 0;
  49
  50   // Called from VariationsService::PerformPreMainMessageLoopStartup().
  51   virtual void OnInitialStartup() {}
  52 };
  53
  54 }  // namespace chrome_variations
  55
  56 #endif  // COMPONENTS_VARIATIONS_VARIATIONS_SERVICE_CLIENT_H_