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

extensions/browser/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 "extensions/browser/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) {
+LevelToPowerSaveBlockerType(core_api::power::Level level) {
   switch (level) {
-    case api::power::LEVEL_SYSTEM:
+    case core_api::power::LEVEL_SYSTEM:
       return content::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension;
-    case api::power::LEVEL_DISPLAY:  // fallthrough
-    case api::power::LEVEL_NONE:
+    case core_api::power::LEVEL_DISPLAY:  // fallthrough
+    case core_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) {
+                                 core_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) {
+      current_level_(core_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;
+  core_api::power::Level new_level = core_api::power::LEVEL_SYSTEM;
   for (ExtensionLevelMap::const_iterator it = extension_levels_.begin();
        it != extension_levels_.end(); ++it) {
-    if (it->second == api::power::LEVEL_DISPLAY)
+    if (it->second == core_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);
+  power_save_blocker_.reset();

[Daniel Erat, 2014/07/02 21:36:06]

resetting this when the ExtensionRegistry is being destroyed rather than in
response to NOTIFICATION_APP_TERMINATING seems to work. i think that the
original reason for this was to ensure that the blocker didn't try to interact
with chromeos::PowerManagerClient after the PMC had been destroyed (which
happens pretty late in the shutdown process, i believe).

 }
 
 }  // namespace extensions