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| 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 #include "chrome/common/pepper_flash.h" | |
| 6 | |
| 7 #include "base/basictypes.h" | |
| 8 #include "base/command_line.h" | |
| 9 #include "base/memory/ref_counted.h" | |
| 10 #include "base/metrics/field_trial.h" | |
| 11 #include "base/string16.h" | |
| 12 #include "chrome/common/chrome_switches.h" | |
| 13 #include "chrome/installer/util/browser_distribution.h" | |
| 14 | |
| 15 #if defined(OS_WIN) | |
| 16 #include "base/win/metro.h" | |
| 17 #endif | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 const char* const kFieldTrialName = "PepperFlash"; | |
| 22 const char* const kDisableGroupName = "DisableByDefault"; | |
| 23 const char* const kEnableGroupName = "EnableByDefault"; | |
| 24 int g_disabled_group_number = -1; | |
| 25 | |
| 26 void ActivateFieldTrial() { | |
| 27 // The field trial will expire on Jan 1st, 2014. | |
| 28 scoped_refptr<base::FieldTrial> trial( | |
| 29 base::FieldTrialList::FactoryGetFieldTrial( | |
| 30 kFieldTrialName, 1000, kDisableGroupName, 2014, 1, 1, | |
| 31 &g_disabled_group_number)); | |
| 32 | |
| 33 CommandLine* command_line = CommandLine::ForCurrentProcess(); | |
| 34 if (command_line->HasSwitch(switches::kPpapiFlashFieldTrial)) { | |
| 35 std::string switch_value = | |
| 36 command_line->GetSwitchValueASCII(switches::kPpapiFlashFieldTrial); | |
| 37 if (switch_value == switches::kPpapiFlashFieldTrialEnableByDefault) { | |
| 38 trial->AppendGroup(kEnableGroupName, 1000); | |
| 39 return; | |
| 40 } else if (switch_value == | |
| 41 switches::kPpapiFlashFieldTrialDisableByDefault) { | |
| 42 return; | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 // Disable by default if one time randomization is not available. | |
| 47 if (!base::FieldTrialList::IsOneTimeRandomizationEnabled()) | |
| 48 return; | |
| 49 | |
| 50 trial->UseOneTimeRandomization(); | |
| 51 // 50% goes into the enable-by-default group. | |
| 52 trial->AppendGroup(kEnableGroupName, 500); | |
| 53 } | |
| 54 | |
| 55 bool IsInFieldTrialGroup() { | |
| 56 static bool activated = false; | |
| 57 if (!activated) { | |
| 58 ActivateFieldTrial(); | |
| 59 activated = true; | |
| 60 } | |
| 61 | |
| 62 int group = base::FieldTrialList::FindValue(kFieldTrialName); | |
| 63 return group != base::FieldTrial::kNotFinalized && | |
| 64 group != g_disabled_group_number; | |
| 65 } | |
| 66 | |
| 67 } // namespace | |
| 68 | |
| 69 bool IsPepperFlashEnabledByDefault() { | |
| 70 #if defined(USE_AURA) | |
| 71 // Pepper Flash is required for Aura (on any OS). | |
| 72 return true; | |
| 73 #elif defined(OS_WIN) | |
| 74 // Pepper Flash is required for Windows 8 Metro mode. | |
| 75 if (base::win::GetMetroModule()) | |
| 76 return true; | |
| 77 | |
| 78 // For other Windows users, enable only for Canary users in a field trial. | |
| 79 if (!IsInFieldTrialGroup()) | |
| 80 return false; | |
| 81 BrowserDistribution* dist = BrowserDistribution::GetDistribution(); | |
| 82 if (!dist) | |
| 83 return false; | |
| 84 string16 channel; | |
| 85 if (!dist->GetChromeChannel(&channel)) | |
| 86 return false; | |
| 87 return (channel == L"canary"); | |
| 88 #elif defined(OS_LINUX) | |
| 89 // For Linux, always try to use it (availability is checked elsewhere). | |
| 90 return true; | |
| 91 #else | |
| 92 return false; | |
| 93 #endif | |
| 94 } | |
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Chromium Code Reviews
Issue 10193001:
Revert 133472 - Use bundled Pepper Flash on Windows (Canary, still on a field trial). (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/