Move ownership of PowerSaveBlocker from WakeLockServiceContext to WakeLockServiceImpl

device/wake_lock/wake_lock_service_impl.h

 // Copyright 2015 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.
 
 #ifndef DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_H_
 #define DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_H_
 
+#include <memory>
+
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
+#include "device/power_save_blocker/power_save_blocker.h"
 #include "device/wake_lock/public/interfaces/wake_lock_service.mojom.h"
-#include "mojo/public/cpp/bindings/interface_request.h"
+#include "device/wake_lock/wake_lock_service_context.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace device {
 
-class WakeLockServiceContext;
-
 class WakeLockServiceImpl : public mojom::WakeLockService {
  public:
-  explicit WakeLockServiceImpl(WakeLockServiceContext* context);
+  WakeLockServiceImpl(
+      mojom::WakeLockServiceRequest request,
+      device::PowerSaveBlocker::PowerSaveBlockerType type,
+      device::PowerSaveBlocker::Reason reason,
+      const std::string& description,
+      int context_id,
+      WakeLockContextCallback native_view_getter,
+      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
   ~WakeLockServiceImpl() override;
 
   // WakeLockSevice implementation.
   void RequestWakeLock() override;
   void CancelWakeLock() override;
+  void AddClient(mojom::WakeLockServiceRequest request) override;
+  void HasWakeLockForTests(
+      const HasWakeLockForTestsCallback& callback) override;
 
  private:
-  // Will outlive this instance.
-  WakeLockServiceContext* context_;
-  bool wake_lock_request_outstanding_;
+  void UpdateWakeLock();
+  void CreateWakeLock();
+  void RemoveWakeLock();
+  void OnConnectionError();
+
+  device::PowerSaveBlocker::PowerSaveBlockerType type_;
+  device::PowerSaveBlocker::Reason reason_;
+  std::unique_ptr<std::string> description_;
+  int num_lock_requests_;
+
+#if defined(OS_ANDROID)
+  int context_id_;
+  WakeLockContextCallback native_view_getter_;
+#endif
+
+  scoped_refptr<base::SequencedTaskRunner> main_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
+
+  // The actual power save blocker for screen.
+  std::unique_ptr<PowerSaveBlocker> wake_lock_;
+
+  // Multiple clients that associate to the same WebContents share the same one
+  // WakeLockServiceImpl instance. Two consecutive |RequestWakeLock| requests
+  // from the same client should be coalesced as one request. Everytime a new
+  // client is being added into the BindingSet, we create an unique_ptr<bool>
+  // as its context, which records this client's request status.
+  mojo::BindingSet<mojom::WakeLockService, std::unique_ptr<bool>> binding_set_;
 
   DISALLOW_COPY_AND_ASSIGN(WakeLockServiceImpl);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_WAKE_LOCK_WAKE_LOCK_SERVICE_IMPL_H_