Remove extension-to-component migration mechanism

chrome/browser/extensions/component_migration_helper.cc

Index: chrome/browser/extensions/component_migration_helper.cc
diff --git a/chrome/browser/extensions/component_migration_helper.cc b/chrome/browser/extensions/component_migration_helper.cc
deleted file mode 100644
index aa7242f20651b664a43cb0c9e9b3f93387071ffc..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/component_migration_helper.cc
+++ /dev/null
@@ -1,195 +0,0 @@
-// Copyright 2016 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/extensions/component_migration_helper.h"
-
-#include "base/stl_util.h"
-#include "base/values.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system_impl.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/common/pref_names.h"
-#include "components/prefs/pref_registry_simple.h"
-#include "components/prefs/pref_service.h"
-#include "components/prefs/scoped_user_pref_update.h"
-#include "content/public/browser/browser_context.h"
-#include "extensions/browser/extension_registry.h"
-#include "extensions/common/feature_switch.h"
-
-namespace extensions {
-
-ComponentMigrationHelper::ComponentMigrationHelper(
-    Profile* profile,
-    ComponentActionDelegate* delegate)
-    : delegate_(delegate),
-      extension_registry_(ExtensionRegistry::Get(profile)),
-      pref_service_(profile->GetPrefs()),
-      extension_system_(ExtensionSystem::Get(profile)),
-      extension_registry_observer_(this) {
-  DCHECK(delegate_);
-  extension_registry_observer_.Add(extension_registry_);
-}
-
-ComponentMigrationHelper::~ComponentMigrationHelper() {}
-
-// static
-void ComponentMigrationHelper::RegisterPrefs(PrefRegistrySimple* registry) {
-  registry->RegisterDictionaryPref(
-      ::prefs::kToolbarMigratedComponentActionStatus);
-}
-
-void ComponentMigrationHelper::Register(const std::string& component_action_id,
-                                        const ExtensionId& extension_id) {
-  DCHECK(GetActionIdForExtensionId(extension_id).empty());
-  migrated_actions_.push_back(
-      std::make_pair(component_action_id, extension_id));
-}
-
-void ComponentMigrationHelper::Unregister(
-    const std::string& component_action_id,
-    const ExtensionId& extension_id) {
-  for (auto it = migrated_actions_.begin(); it != migrated_actions_.end();
-       it++) {
-    if (it->first == component_action_id && it->second == extension_id) {
-      migrated_actions_.erase(it);
-      return;
-    }
-  }
-}
-
-void ComponentMigrationHelper::OnFeatureEnabled(
-    const std::string& component_action_id) {
-  DCHECK(FeatureSwitch::extension_action_redesign()->IsEnabled());
-  std::vector<ExtensionId> extension_ids =
-      GetExtensionIdsForActionId(component_action_id);
-  DCHECK(!extension_ids.empty());
-
-  enabled_actions_.insert(component_action_id);
-  // Unload any extensions that we are migrating from.
-  bool extension_was_installed = false;
-  for (const auto& id : extension_ids) {
-    if (IsExtensionInstalledAndEnabled(id)) {
-      extension_was_installed = true;
-      UnloadExtension(id);
-    }
-  }
-
-  // Read the pref to determine component action status.  If not set, set to
-  // true if we unloaded an extension.
-  const base::DictionaryValue* migration_pref = pref_service_->GetDictionary(
-      ::prefs::kToolbarMigratedComponentActionStatus);
-  bool component_action_pref = false;
-  if (migration_pref->HasKey(component_action_id)) {
-    component_action_pref = GetComponentActionPref(component_action_id);
-  } else if (extension_was_installed) {
-    SetComponentActionPref(component_action_id, true);
-    component_action_pref = true;
-  }
-
-  if (component_action_pref &&
-      !delegate_->HasComponentAction(component_action_id)) {
-    delegate_->AddComponentAction(component_action_id);
-  }
-}
-
-void ComponentMigrationHelper::OnFeatureDisabled(
-    const std::string& component_action_id) {
-  std::vector<ExtensionId> extension_ids =
-      GetExtensionIdsForActionId(component_action_id);
-  DCHECK(!extension_ids.empty());
-
-  enabled_actions_.erase(component_action_id);
-  RemoveComponentActionPref(component_action_id);
-
-  if (FeatureSwitch::extension_action_redesign()->IsEnabled() &&
-      delegate_->HasComponentAction(component_action_id))
-    delegate_->RemoveComponentAction(component_action_id);
-}
-
-void ComponentMigrationHelper::OnActionRemoved(
-    const std::string& component_action_id) {
-  // Record preference for the future.
-  SetComponentActionPref(component_action_id, false);
-
-  // Remove the action.
-  if (delegate_->HasComponentAction(component_action_id))
-    delegate_->RemoveComponentAction(component_action_id);
-}
-
-void ComponentMigrationHelper::OnExtensionReady(
-    content::BrowserContext* browser_context,
-    const Extension* extension) {
-  const ExtensionId& extension_id = extension->id();
-  const std::string& component_action_id =
-      GetActionIdForExtensionId(extension_id);
-  if (component_action_id.empty())
-    return;
-  if (base::ContainsKey(enabled_actions_, component_action_id)) {
-    UnloadExtension(extension_id);
-    SetComponentActionPref(component_action_id, true);
-
-    if (!delegate_->HasComponentAction(component_action_id))
-      delegate_->AddComponentAction(component_action_id);
-  }
-}
-
-bool ComponentMigrationHelper::GetComponentActionPref(
-    const std::string& component_action_id) const {
-  const base::DictionaryValue* migration_pref = pref_service_->GetDictionary(
-      ::prefs::kToolbarMigratedComponentActionStatus);
-  bool component_action_pref = false;
-
-  // If the entry for |component_action_id| doesn't exist, GetBoolean() does not
-  // modify |component_action_pref|.
-  migration_pref->GetBoolean(component_action_id, &component_action_pref);
-  return component_action_pref;
-}
-
-void ComponentMigrationHelper::SetComponentActionPref(
-    const std::string& component_action_id,
-    bool enabled) {
-  DictionaryPrefUpdate update(pref_service_,
-                              ::prefs::kToolbarMigratedComponentActionStatus);
-  update->SetBoolean(component_action_id, enabled);
-}
-
-bool ComponentMigrationHelper::IsExtensionInstalledAndEnabled(
-    const ExtensionId& extension_id) const {
-  return extension_registry_->enabled_extensions().Contains(extension_id) ||
-         extension_registry_->terminated_extensions().Contains(extension_id);
-}
-
-void ComponentMigrationHelper::UnloadExtension(
-    const ExtensionId& extension_id) {
-  extension_system_->extension_service()->UnloadExtension(
-      extension_id, UnloadedExtensionInfo::REASON_MIGRATED_TO_COMPONENT);
-}
-
-void ComponentMigrationHelper::RemoveComponentActionPref(
-    const std::string& component_action_id) {
-  DictionaryPrefUpdate update(pref_service_,
-                              ::prefs::kToolbarMigratedComponentActionStatus);
-  update->Remove(component_action_id, nullptr);
-}
-
-std::vector<std::string> ComponentMigrationHelper::GetExtensionIdsForActionId(
-    const std::string& component_action_id) const {
-  std::vector<ExtensionId> extension_ids;
-  for (const auto& i : migrated_actions_) {
-    if (i.first == component_action_id)
-      extension_ids.push_back(i.second);
-  }
-  return extension_ids;
-}
-
-std::string ComponentMigrationHelper::GetActionIdForExtensionId(
-    const ExtensionId& extension_id) const {
-  for (const auto& i : migrated_actions_) {
-    if (i.second == extension_id)
-      return i.first;
-  }
-  return "";
-}
-
-}  // namespace extensions