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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/common/pepper_flash.h"
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/memory/ref_counted.h"
#include "base/metrics/field_trial.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/chrome_version_info.h"
#if defined(OS_WIN)
#include "base/win/metro.h"
#endif
namespace {
const char* const kFieldTrialName = "ApplyPepperFlash";
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);
}
bool IsInFieldTrialGroup() {
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;
}
} // namespace
bool ConductingPepperFlashFieldTrial() {
#if defined(OS_WIN)
return true;
#else
return false;
#endif
}
bool IsPepperFlashEnabledByDefault() {
#if defined(USE_AURA)
// Pepper Flash is required for Aura (on any OS).
return true;
#elif defined(OS_WIN)
// Pepper Flash is required for Windows 8 Metro mode.
if (base::win::GetMetroModule())
return true;
chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
if (channel == chrome::VersionInfo::CHANNEL_CANARY)
return true;
// For other Windows users, enable only for Dev users in a field trial.
return channel == chrome::VersionInfo::CHANNEL_DEV && IsInFieldTrialGroup();
#elif defined(OS_LINUX)
// For Linux, always try to use it (availability is checked elsewhere).
return true;
#else
return false;
#endif
}
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