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// Copyright 2015 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 COMPONENTS_VARIATIONS_SERVICE_VARIATIONS_SERVICE_CLIENT_H_
#define COMPONENTS_VARIATIONS_SERVICE_VARIATIONS_SERVICE_CLIENT_H_
#include <string>
#include "base/callback.h"
#include "base/strings/string16.h"
#include "base/version.h"
#include "components/version_info/version_info.h"
namespace base {
class SequencedWorkerPool;
}
namespace net {
class URLRequestContextGetter;
}
namespace network_time {
class NetworkTimeTracker;
}
namespace variations {
// An abstraction of operations that depend on the embedder's (e.g. Chrome)
// environment.
class VariationsServiceClient {
public:
virtual ~VariationsServiceClient() {}
// Returns the current application locale (e.g. "en-US").
virtual std::string GetApplicationLocale() = 0;
// Returns the SequencedWorkerPool on which the VariationsService should run
// tasks that may block.
virtual base::SequencedWorkerPool* GetBlockingPool() = 0;
// Returns a callback that when run returns the base::Version to use for
// variations seed simulation. VariationsService guarantees that the callback
// will be run on the pool returned by
// VariationsServiceClient::GetBlockingPool().
virtual base::Callback<base::Version(void)>
GetVersionForSimulationCallback() = 0;
virtual net::URLRequestContextGetter* GetURLRequestContext() = 0;
virtual network_time::NetworkTimeTracker* GetNetworkTimeTracker() = 0;
// Gets the channel of the embedder.
virtual version_info::Channel GetChannel() = 0;
// Returns whether the embedder overrides the value of the restrict parameter.
// |parameter| is an out-param that will contain the value of the restrict
// parameter if true is returned.
virtual bool OverridesRestrictParameter(std::string* parameter) = 0;
// Called from VariationsService::PerformPreMainMessageLoopStartup().
virtual void OnInitialStartup() {}
};
} // namespace variations
#endif // COMPONENTS_VARIATIONS_SERVICE_VARIATIONS_SERVICE_CLIENT_H_
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