chromium/content/public/browser/synthetic_trial_syncer.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_SYNTHETIC_TRIAL_SYNCER_H_
#define CONTENT_PUBLIC_BROWSER_SYNTHETIC_TRIAL_SYNCER_H_

#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "components/variations/synthetic_trials.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_child_process_observer.h"
#include "content/public/browser/render_process_host_creation_observer.h"
#include "content/public/browser/render_process_host_observer.h"
#include "mojo/public/cpp/bindings/remote.h"

namespace variations {
class SyntheticTrialRegistry;
}  // namespace variations

namespace content {

namespace mojom {
class SyntheticTrialConfiguration;
}  // namespace mojom

// This class is used by the browser process to tell child processes
// what synthetic trial groups the browser process joins in.
//
// This class registers itself as an observer of SyntheticTrialObserver.
// SyntheticTrialRegistry notifies this class when a synthetic trial group
// is updated.
//
// This class also registers itself as BrowserChildProcessObserver,
// RenderProcessHostCreationObserver and RenderProcessHostObserver to
// tell the synthetic trial groups just after a child process is created.
// At that time, this class gets all joined synthetic groups by calling
// SyntheticTrialRegistry::GetSyntheticTrialGroups().
class CONTENT_EXPORT SyntheticTrialSyncer
    : public variations::SyntheticTrialObserver,
      public BrowserChildProcessObserver,
      public RenderProcessHostCreationObserver,
      public RenderProcessHostObserver { … };

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_SYNTHETIC_TRIAL_SYNCER_H_