chrome_browser_field_trials.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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#include "base/gtest_prod_util.h"
11#include "base/time.h"
12
13class ChromeBrowserFieldTrials {
14 public:
15  explicit ChromeBrowserFieldTrials(const CommandLine& command_line);
16  ~ChromeBrowserFieldTrials();
17
18  // Add an invocation of your field trial init function to this method.
19  // |install_time| is the time this browser was installed (or the last time
20  // prefs was reset). |install_time| is used by trials that are only created
21  // for new installs of the browser.
22  void SetupFieldTrials(const base::Time& install_time);
23
24 private:
25  FRIEND_TEST_ALL_PREFIXES(BrowserMainTest,
26                           WarmConnectionFieldTrial_WarmestSocket);
27  FRIEND_TEST_ALL_PREFIXES(BrowserMainTest, WarmConnectionFieldTrial_Random);
28  FRIEND_TEST_ALL_PREFIXES(BrowserMainTest, WarmConnectionFieldTrial_Invalid);
29
30  // A/B test for spdy when --use-spdy not set.
31  void SpdyFieldTrial();
32
33  // A/B test for warmest socket vs. most recently used socket.
34  void WarmConnectionFieldTrial();
35
36  // Field trial to see what disabling DNS pre-resolution does to
37  // latency of page loads.
38  void PredictorFieldTrial();
39
40  // A field trial to see what effects launching Chrome automatically on
41  // computer startup has on retention and usage of Chrome.
42  void AutoLaunchChromeFieldTrial();
43
44  // A collection of one-time-randomized and session-randomized field trials
45  // intended to test the uniformity and correctness of the field trial control,
46  // bucketing and reporting systems.
47  void SetupUniformityFieldTrials(const base::Time& install_date);
48
49  // Disables the new tab field trial if not running in desktop mode.
50  void DisableNewTabFieldTrialIfNecesssary();
51
52  // Sets up the InfiniteCache field trial.
53  void SetUpInfiniteCacheFieldTrial();
54
55  // Sets up field trials for doing Cache Sensitivity Analysis.
56  void SetUpCacheSensitivityAnalysisFieldTrial();
57
58  // A field trial to determine the impact of using non-blocking reads for
59  // TCP sockets on Windows instead of overlapped I/O.
60  void WindowsOverlappedTCPReadsFieldTrial();
61
62  // Instantiates dynamic trials by querying their state, to ensure they get
63  // reported as used.
64  void InstantiateDynamicTrials();
65
66  const CommandLine& parsed_command_line_;
67
68  DISALLOW_COPY_AND_ASSIGN(ChromeBrowserFieldTrials);
69};
70
71#endif  // CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_
72