Revert of Move content/browser/power_save_blocker to //device/power_save_blocker

content/browser/power_save_blocker_chromeos.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 "content/browser/power_save_blocker_impl.h"
+
+#include <string>
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "chromeos/dbus/power_policy_controller.h"
+
+namespace content {
+
+namespace {
+
+// Converts a PowerSaveBlocker::Reason to a
+// chromeos::PowerPolicyController::WakeLockReason.
+chromeos::PowerPolicyController::WakeLockReason GetWakeLockReason(
+    PowerSaveBlocker::Reason reason) {
+  switch (reason) {
+    case PowerSaveBlocker::kReasonAudioPlayback:
+      return chromeos::PowerPolicyController::REASON_AUDIO_PLAYBACK;
+    case PowerSaveBlocker::kReasonVideoPlayback:
+      return chromeos::PowerPolicyController::REASON_VIDEO_PLAYBACK;
+    case PowerSaveBlocker::kReasonOther:
+      return chromeos::PowerPolicyController::REASON_OTHER;
+  }
+  return chromeos::PowerPolicyController::REASON_OTHER;
+}
+
+}  // namespace
+
+class PowerSaveBlockerImpl::Delegate
+    : public base::RefCountedThreadSafe<PowerSaveBlockerImpl::Delegate> {
+ public:
+  Delegate(PowerSaveBlockerType type,
+           Reason reason,
+           const std::string& description,
+           scoped_refptr<base::SequencedTaskRunner> ui_task_runner)
+      : type_(type),
+        reason_(reason),
+        description_(description),
+        block_id_(0),
+        ui_task_runner_(ui_task_runner) {}
+
+  void ApplyBlock() {
+    DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
+    if (!chromeos::PowerPolicyController::IsInitialized())
+      return;
+
+    auto* controller = chromeos::PowerPolicyController::Get();
+    switch (type_) {
+      case kPowerSaveBlockPreventAppSuspension:
+        block_id_ = controller->AddSystemWakeLock(GetWakeLockReason(reason_),
+                                                  description_);
+        break;
+      case kPowerSaveBlockPreventDisplaySleep:
+        block_id_ = controller->AddScreenWakeLock(GetWakeLockReason(reason_),
+                                                  description_);
+        break;
+      default:
+        NOTREACHED() << "Unhandled block type " << type_;
+    }
+  }
+
+  void RemoveBlock() {
+    DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
+    if (!chromeos::PowerPolicyController::IsInitialized())
+      return;
+
+    chromeos::PowerPolicyController::Get()->RemoveWakeLock(block_id_);
+  }
+
+ private:
+  friend class base::RefCountedThreadSafe<Delegate>;
+  virtual ~Delegate() {}
+
+  PowerSaveBlockerType type_;
+  Reason reason_;
+  std::string description_;
+
+  // ID corresponding to the block request in PowerPolicyController.
+  int block_id_;
+
+  scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(Delegate);
+};
+
+PowerSaveBlockerImpl::PowerSaveBlockerImpl(
+    PowerSaveBlockerType type,
+    Reason reason,
+    const std::string& description,
+    scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> blocking_task_runner)
+    : delegate_(new Delegate(type, reason, description, ui_task_runner)),
+      ui_task_runner_(ui_task_runner),
+      blocking_task_runner_(blocking_task_runner) {
+  ui_task_runner_->PostTask(FROM_HERE,
+                            base::Bind(&Delegate::ApplyBlock, delegate_));
+}
+
+PowerSaveBlockerImpl::~PowerSaveBlockerImpl() {
+  ui_task_runner_->PostTask(FROM_HERE,
+                            base::Bind(&Delegate::RemoveBlock, delegate_));
+}
+
+}  // namespace content