chromeos: Remove PowerStateOverride.

chromeos/power/power_state_override.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 "chromeos/power/power_state_override.h"
-
-#include "base/bind.h"
-#include "base/message_loop.h"
-#include "base/time.h"
-#include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/dbus/power_manager_client.h"
-
-namespace {
-
-// Frequency with which overrides are renewed.
-const int kHeartbeatTimeInSecs = 300;
-
-// Duration beyond |kHeartbeatTimeInSecs| for which overrides are requested.
-// This should be long enough that we're able to renew the request before it
-// expires, but short enough that the power manager won't end up honoring a
-// stale request for a long time if Chrome crashes and orphans its requests.
-const int kRequestSlackInSecs = 15;
-
-}  // namespace
-
-namespace chromeos {
-
-PowerStateOverride::PowerStateOverride(Mode mode)
-    : override_types_(0),
-      request_id_(0),
-      dbus_thread_manager_(DBusThreadManager::Get()) {
-  switch (mode) {
-    case BLOCK_DISPLAY_SLEEP:
-      override_types_ |= (PowerManagerClient::DISABLE_IDLE_DIM |
-                          PowerManagerClient::DISABLE_IDLE_BLANK);
-      // fallthrough
-    case BLOCK_SYSTEM_SUSPEND:
-      override_types_ |= PowerManagerClient::DISABLE_IDLE_SUSPEND;
-      break;
-    default:
-      NOTREACHED() << "Unhandled mode " << mode;
-  }
-
-  dbus_thread_manager_->AddObserver(this);
-
-  // request_id_ = 0 will create a new override request.
-  // We do a post task here to ensure that this request runs 'after' our
-  // constructor is done. If not, there is a possibility (though only in
-  // tests at the moment) that the power state override request executes
-  // and returns before the constructor has finished executing. This will
-  // cause an AddRef and a Release, the latter destructing our current
-  // instance even before the constructor has finished executing (as it does
-  // in the DownloadExtensionTest browsertests currently).
-  MessageLoop::current()->PostTask(
-      FROM_HERE,
-      base::Bind(&PowerStateOverride::CallRequestPowerStateOverrides, this));
-
-  heartbeat_.Start(FROM_HERE,
-                   base::TimeDelta::FromSeconds(kHeartbeatTimeInSecs),
-                   this,
-                   &PowerStateOverride::CallRequestPowerStateOverrides);
-}
-
-PowerStateOverride::~PowerStateOverride() {
-  if (dbus_thread_manager_)
-    dbus_thread_manager_->RemoveObserver(this);
-  CancelRequest();
-}
-
-void PowerStateOverride::OnDBusThreadManagerDestroying(
-    DBusThreadManager* manager) {
-  DCHECK_EQ(manager, dbus_thread_manager_);
-  CancelRequest();
-  dbus_thread_manager_ = NULL;
-}
-
-void PowerStateOverride::SetRequestId(uint32 request_id) {
-  request_id_ = request_id;
-}
-
-void PowerStateOverride::CallRequestPowerStateOverrides() {
-  DCHECK(dbus_thread_manager_);
-  dbus_thread_manager_->GetPowerManagerClient()->RequestPowerStateOverrides(
-      request_id_,
-      base::TimeDelta::FromSeconds(
-          kHeartbeatTimeInSecs + kRequestSlackInSecs),
-      override_types_,
-      base::Bind(&PowerStateOverride::SetRequestId, this));
-}
-
-void PowerStateOverride::CancelRequest() {
-  if (request_id_) {
-    DCHECK(dbus_thread_manager_);
-    dbus_thread_manager_->GetPowerManagerClient()->
-        CancelPowerStateOverrides(request_id_);
-    request_id_ = 0;
-  }
-}
-
-}  // namespace chromeos