Move FeatureSwitch to top-level extensions/

chrome/common/extensions/feature_switch.cc

-// 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/extensions/feature_switch.h"
-
-#include "base/command_line.h"
-#include "base/lazy_instance.h"
-#include "base/metrics/field_trial.h"
-#include "base/strings/string_util.h"
-#include "chrome/common/chrome_switches.h"
-#include "extensions/common/switches.h"
-
-namespace extensions {
-
-namespace {
-
-class CommonSwitches {
- public:
-  CommonSwitches()
-      : easy_off_store_install(
-            ::switches::kEasyOffStoreExtensionInstall,
-            FeatureSwitch::DEFAULT_DISABLED),
-        global_commands(
-            ::switches::kGlobalCommands,
-            FeatureSwitch::DEFAULT_DISABLED),
-        script_badges(
-            ::switches::kScriptBadges,
-            FeatureSwitch::DEFAULT_DISABLED),
-        script_bubble(
-            ::switches::kScriptBubble,
-            FeatureSwitch::DEFAULT_DISABLED),
-        prompt_for_external_extensions(
-            ::switches::kPromptForExternalExtensions,
-#if defined(OS_WIN)
-            FeatureSwitch::DEFAULT_ENABLED),
-#else
-            FeatureSwitch::DEFAULT_DISABLED),
-#endif
-        error_console(
-            switches::kErrorConsole,
-            FeatureSwitch::DEFAULT_DISABLED) {}
-
-  FeatureSwitch easy_off_store_install;
-  FeatureSwitch global_commands;
-  FeatureSwitch script_badges;
-  FeatureSwitch script_bubble;
-  FeatureSwitch prompt_for_external_extensions;
-  FeatureSwitch error_console;
-};
-
-base::LazyInstance<CommonSwitches> g_common_switches =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-FeatureSwitch* FeatureSwitch::easy_off_store_install() {
-  return &g_common_switches.Get().easy_off_store_install;
-}
-FeatureSwitch* FeatureSwitch::global_commands() {
-  return &g_common_switches.Get().global_commands;
-}
-FeatureSwitch* FeatureSwitch::script_badges() {
-  return &g_common_switches.Get().script_badges;
-}
-FeatureSwitch* FeatureSwitch::script_bubble() {
-  return &g_common_switches.Get().script_bubble;
-}
-FeatureSwitch* FeatureSwitch::prompt_for_external_extensions() {
-  return &g_common_switches.Get().prompt_for_external_extensions;
-}
-FeatureSwitch* FeatureSwitch::error_console() {
-  return &g_common_switches.Get().error_console;
-}
-
-FeatureSwitch::ScopedOverride::ScopedOverride(FeatureSwitch* feature,
-                                              bool override_value)
-    : feature_(feature),
-      previous_value_(feature->GetOverrideValue()) {
-  feature_->SetOverrideValue(
-      override_value ? OVERRIDE_ENABLED : OVERRIDE_DISABLED);
-}
-
-FeatureSwitch::ScopedOverride::~ScopedOverride() {
-  feature_->SetOverrideValue(previous_value_);
-}
-
-FeatureSwitch::FeatureSwitch(const char* switch_name,
-                             DefaultValue default_value) {
-  Init(CommandLine::ForCurrentProcess(), switch_name, default_value);
-}
-
-FeatureSwitch::FeatureSwitch(const CommandLine* command_line,
-                             const char* switch_name,
-                             DefaultValue default_value) {
-  Init(command_line, switch_name, default_value);
-}
-
-void FeatureSwitch::Init(const CommandLine* command_line,
-                         const char* switch_name,
-                         DefaultValue default_value) {
-  command_line_ = command_line;
-  switch_name_ = switch_name;
-  default_value_ = default_value == DEFAULT_ENABLED;
-  override_value_ = OVERRIDE_NONE;
-}
-
-bool FeatureSwitch::IsEnabled() const {
-  if (override_value_ != OVERRIDE_NONE)
-    return override_value_ == OVERRIDE_ENABLED;
-
-  std::string temp = command_line_->GetSwitchValueASCII(switch_name_);
-  std::string switch_value;
-  TrimWhitespaceASCII(temp, TRIM_ALL, &switch_value);
-
-  if (switch_value == "1")
-    return true;
-
-  if (switch_value == "0")
-    return false;
-
-  if (!default_value_ && command_line_->HasSwitch(GetLegacyEnableFlag()))
-    return true;
-
-  if (default_value_ && command_line_->HasSwitch(GetLegacyDisableFlag()))
-    return false;
-
-  return default_value_;
-}
-
-std::string FeatureSwitch::GetLegacyEnableFlag() const {
-  return std::string("enable-") + switch_name_;
-}
-
-std::string FeatureSwitch::GetLegacyDisableFlag() const {
-  return std::string("disable-") + switch_name_;
-}
-
-void FeatureSwitch::SetOverrideValue(OverrideValue override_value) {
-  override_value_ = override_value;
-}
-
-FeatureSwitch::OverrideValue FeatureSwitch::GetOverrideValue() const {
-  return override_value_;
-}
-
-}  // namespace extensions