Move chrome.power API from chrome/ to extensions/.

chrome/browser/extensions/api/power/power_api_manager.cc

-// Copyright (c) 2013 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/api/power/power_api_manager.h"
-
-#include "base/bind.h"
-#include "base/lazy_instance.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "content/public/browser/notification_service.h"
-#include "extensions/browser/extension_registry.h"
-#include "extensions/common/extension.h"
-
-namespace extensions {
-
-namespace {
-
-const char kPowerSaveBlockerReason[] = "extension";
-
-content::PowerSaveBlocker::PowerSaveBlockerType
-LevelToPowerSaveBlockerType(api::power::Level level) {
-  switch (level) {
-    case api::power::LEVEL_SYSTEM:
-      return content::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension;
-    case api::power::LEVEL_DISPLAY:  // fallthrough
-    case api::power::LEVEL_NONE:
-      return content::PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep;
-  }
-  NOTREACHED() << "Unhandled level " << level;
-  return content::PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep;
-}
-
-base::LazyInstance<BrowserContextKeyedAPIFactory<PowerApiManager> > g_factory =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-// static
-PowerApiManager* PowerApiManager::Get(content::BrowserContext* context) {
-  return BrowserContextKeyedAPIFactory<PowerApiManager>::Get(context);
-}
-
-// static
-BrowserContextKeyedAPIFactory<PowerApiManager>*
-PowerApiManager::GetFactoryInstance() {
-  return g_factory.Pointer();
-}
-
-void PowerApiManager::AddRequest(const std::string& extension_id,
-                                 api::power::Level level) {
-  extension_levels_[extension_id] = level;
-  UpdatePowerSaveBlocker();
-}
-
-void PowerApiManager::RemoveRequest(const std::string& extension_id) {
-  extension_levels_.erase(extension_id);
-  UpdatePowerSaveBlocker();
-}
-
-void PowerApiManager::SetCreateBlockerFunctionForTesting(
-    CreateBlockerFunction function) {
-  create_blocker_function_ = !function.is_null() ? function :
-      base::Bind(&content::PowerSaveBlocker::Create);
-}
-
-void PowerApiManager::Observe(int type,
-                              const content::NotificationSource& source,
-                              const content::NotificationDetails& details) {
-  DCHECK_EQ(type, chrome::NOTIFICATION_APP_TERMINATING);
-  power_save_blocker_.reset();
-}
-
-void PowerApiManager::OnExtensionUnloaded(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    UnloadedExtensionInfo::Reason reason) {
-  RemoveRequest(extension->id());
-  UpdatePowerSaveBlocker();
-}
-
-PowerApiManager::PowerApiManager(content::BrowserContext* context)
-    : browser_context_(context),
-      create_blocker_function_(base::Bind(&content::PowerSaveBlocker::Create)),
-      current_level_(api::power::LEVEL_SYSTEM) {
-  ExtensionRegistry::Get(browser_context_)->AddObserver(this);
-  registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
-                 content::NotificationService::AllSources());
-}
-
-PowerApiManager::~PowerApiManager() {}
-
-void PowerApiManager::UpdatePowerSaveBlocker() {
-  if (extension_levels_.empty()) {
-    power_save_blocker_.reset();
-    return;
-  }
-
-  api::power::Level new_level = api::power::LEVEL_SYSTEM;
-  for (ExtensionLevelMap::const_iterator it = extension_levels_.begin();
-       it != extension_levels_.end(); ++it) {
-    if (it->second == api::power::LEVEL_DISPLAY)
-      new_level = it->second;
-  }
-
-  // If the level changed and we need to create a new blocker, do a swap
-  // to ensure that there isn't a brief period where power management is
-  // unblocked.
-  if (!power_save_blocker_ || new_level != current_level_) {
-    content::PowerSaveBlocker::PowerSaveBlockerType type =
-        LevelToPowerSaveBlockerType(new_level);
-    scoped_ptr<content::PowerSaveBlocker> new_blocker(
-        create_blocker_function_.Run(type, kPowerSaveBlockerReason));
-    power_save_blocker_.swap(new_blocker);
-    current_level_ = new_level;
-  }
-}
-
-void PowerApiManager::Shutdown() {
-  // Unregister here rather than in the d'tor; otherwise this call will recreate
-  // the already-deleted ExtensionRegistry.
-  ExtensionRegistry::Get(browser_context_)->RemoveObserver(this);
-}
-
-}  // namespace extensions