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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.
#include "chrome/browser/component_updater/pepper_flash_field_trial.h"
#include "base/command_line.h"
#include "base/memory/ref_counted.h"
#include "base/metrics/field_trial.h"
#include "chrome/common/chrome_switches.h"
namespace {
const char* const kFieldTrialName = "PepperFlash";
const char* const kDisableGroupName = "DisableByDefault";
const char* const kEnableGroupName = "EnableByDefault";
int g_disabled_group_number = -1;
void ActivateFieldTrial() {
// The field trial will expire on Jan 1st, 2014.
scoped_refptr<base::FieldTrial> trial(
base::FieldTrialList::FactoryGetFieldTrial(
kFieldTrialName, 1000, kDisableGroupName, 2014, 1, 1,
&g_disabled_group_number));
CommandLine* command_line = CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kPpapiFlashFieldTrial)) {
std::string switch_value =
command_line->GetSwitchValueASCII(switches::kPpapiFlashFieldTrial);
if (switch_value == switches::kPpapiFlashFieldTrialEnableByDefault) {
trial->AppendGroup(kEnableGroupName, 1000);
return;
} else if (switch_value ==
switches::kPpapiFlashFieldTrialDisableByDefault) {
return;
}
}
// Disable by default if one time randomization is not available.
if (!base::FieldTrialList::IsOneTimeRandomizationEnabled())
return;
trial->UseOneTimeRandomization();
// 50% goes into the enable-by-default group.
trial->AppendGroup(kEnableGroupName, 500);
}
} // namespace
// static
bool PepperFlashFieldTrial::InEnableByDefaultGroup() {
static bool activated = false;
if (!activated) {
ActivateFieldTrial();
activated = true;
}
int group = base::FieldTrialList::FindValue(kFieldTrialName);
return group != base::FieldTrial::kNotFinalized &&
group != g_disabled_group_number;
}
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