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/basictypes.h"
   9 #include "base/command_line.h"
  10
  11 class PrefService;
  12
  13 namespace base {
  14 class Time;
  15 }
  16
  17 class ChromeBrowserFieldTrials {
  18  public:
  19   explicit ChromeBrowserFieldTrials(const base::CommandLine& command_line);
  20   ~ChromeBrowserFieldTrials();
  21
  22   // Called by the browser main sequence to set up Field Trials for this client.
  23   // |local_state| is used to set browser-wide properties.
  24   void SetupFieldTrials(const base::Time& install_time,
  25                         PrefService* local_state);
  26
  27  private:
  28   // Instantiates dynamic trials by querying their state, to ensure they get
  29   // reported as used.
  30   void InstantiateDynamicTrials();
  31
  32   const base::CommandLine& parsed_command_line_;
  33
  34   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserFieldTrials);
  35 };
  36
  37 #endif  // CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_