chrome/browser/chrome_browser_field_trials.h

   1 // Copyright (c) 2012 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 CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_
   6 #define CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_
   7
   8 #include "base/macros.h"
   9 #include "components/variations/platform_field_trials.h"
  10
  11 class PrefService;
  12
  13 namespace base {
  14 class FeatureList;
  15 }
  16
  17 class ChromeBrowserFieldTrials : public variations::PlatformFieldTrials {
  18  public:
  19   explicit ChromeBrowserFieldTrials(PrefService* local_state);
  20   ~ChromeBrowserFieldTrials() override;
  21
  22   // variations::PlatformFieldTrials:
  23   void SetupFieldTrials() override;
  24   void SetupFeatureControllingFieldTrials(
  25       bool has_seed,
  26       base::FeatureList* feature_list) override;
  27   void RegisterSyntheticTrials() override;
  28
  29  private:
  30   // Instantiates dynamic trials by querying their state, to ensure they get
  31   // reported as used.
  32   void InstantiateDynamicTrials();
  33
  34   // Weak pointer to the local state prefs store.
  35   PrefService* const local_state_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserFieldTrials);
  38 };
  39
  40 #endif  // CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_