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// Copyright (c) 2012 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 CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_
#define CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_
#include <string>
class CommandLine;
class Profile;
namespace prerender {
// Parse the --prerender= command line switch, which controls both prerendering
// and prefetching. If the switch is unset, or is set to "auto", then the user
// is assigned to a field trial.
void ConfigurePrefetchAndPrerender(const CommandLine& command_line);
// Returns true if the user has opted in or has been opted in to the
// prerendering from Omnibox experiment.
bool IsOmniboxEnabled(Profile* profile);
// Returns true iff the Prerender Local Predictor is enabled.
bool IsLocalPredictorEnabled();
// Returns true iff the LoggedIn Predictor is enabled.
bool IsLoggedInPredictorEnabled();
// Returns true iff the side-effect free whitelist is enabled.
bool IsSideEffectFreeWhitelistEnabled();
// Returns true if the local predictor should actually launch prerenders.
bool IsLocalPredictorPrerenderLaunchEnabled();
// Returns true if the local predictor should prerender, but only as control
// group. If the local predictor never launches prerenders, then this setting
// is irrelevant.
bool IsLocalPredictorPrerenderAlwaysControlEnabled();
// Returns the TTL to be used for the local predictor.
int GetLocalPredictorTTLSeconds();
// Returns the half-life time to use to decay local predictor prerender
// priorities.
int GetLocalPredictorPrerenderPriorityHalfLifeTimeSeconds();
// Returns the maximum number of concurrent prerenders the local predictor
// may maintain.
int GetLocalPredictorMaxConcurrentPrerenders();
} // namespace prerender
#endif // CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_
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