[Device Service] Move PowerMonitor into the Device Service

content/browser/service_manager/service_manager_context.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 CONTENT_BROWSER_SERVICE_MANAGER_SERVICE_MANAGER_CONTEXT_H_
 #define CONTENT_BROWSER_SERVICE_MANAGER_SERVICE_MANAGER_CONTEXT_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
 namespace service_manager {
+class Connection;
 class Connector;
 }
 
 namespace content {
 
 // ServiceManagerContext manages the browser's connection to the ServiceManager,
 // hosting a new in-process ServiceManagerContext if the browser was not
 // launched from an external one.
 class CONTENT_EXPORT ServiceManagerContext {
  public:
   ServiceManagerContext();
   ~ServiceManagerContext();
 
   // Returns a service_manager::Connector that can be used on the IO thread.
   static service_manager::Connector* GetConnectorForIOThread();
 
  private:
   class InProcessServiceManagerContext;
 
   scoped_refptr<InProcessServiceManagerContext> in_process_context_;
 
+  // A connection to device service, will be set up on startup to trigger
+  // creating a device service instance beforehand, as device service is
+  // singletion service, later the same instance will serve all the clients
+  // wanting to connect to device service.
+  std::unique_ptr<service_manager::Connection> device_connection_;
+
   DISALLOW_COPY_AND_ASSIGN(ServiceManagerContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_MANAGER_SERVICE_MANAGER_CONTEXT_H_