Cleanup unused class/includes device(motion|orientation)

content/browser/device_sensors/device_inertial_sensor_service.h

 // Copyright 2014 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_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_
 #define CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/singleton.h"
 #include "base/threading/thread_checker.h"
 #include "content/browser/device_sensors/inertial_sensor_consts.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 class DataFetcherSharedMemory;
-class RenderProcessHost;
 
-// Owns the DeviceMotionProvider (the background polling thread) and keeps
-// track of the number of consumers currently using the data (and pausing
-// the provider when not in use).
+// Owns the data fetcher for Device Motion and Orientation and keeps track of
+// the number of consumers currently using the data. The data fetcher is stopped
+// when there are no consumers.
 class CONTENT_EXPORT DeviceInertialSensorService {
  public:
   // Returns the DeviceInertialSensorService singleton.
   static DeviceInertialSensorService* GetInstance();
 
   // Increments the number of users of the provider. The Provider is running
   // when there's > 0 users, and is paused when the count drops to 0.
   // Must be called on the I/O thread.
   void AddConsumer(ConsumerType consumer_type);
 
   // Removes a consumer. Should be matched with an AddConsumer call.
   // Must be called on the I/O thread.
   void RemoveConsumer(ConsumerType cosumer_type);
 
   // Returns the shared memory handle of the device motion data duplicated
   // into the given process.
   base::SharedMemoryHandle GetSharedMemoryHandleForProcess(
       ConsumerType consumer_type, base::ProcessHandle handle);
 
   // Stop/join with the background polling thread in |provider_|.
   void Shutdown();
 
   // Injects a custom data fetcher for testing purposes. This class takes
   // ownership of the injected object.
-  void SetDataFetcherForTests(DataFetcherSharedMemory* test_data_fetcher);
+  void SetDataFetcherForTesting(DataFetcherSharedMemory* test_data_fetcher);
 
  private:
   friend struct DefaultSingletonTraits<DeviceInertialSensorService>;
 
   DeviceInertialSensorService();
   virtual ~DeviceInertialSensorService();
 
   bool ChangeNumberConsumers(ConsumerType consumer_type,
       int delta);
   int GetNumberConsumers(ConsumerType consumer_type) const;
 
   int num_motion_readers_;
   int num_orientation_readers_;
   bool is_shutdown_;
   scoped_ptr<DataFetcherSharedMemory> data_fetcher_;
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceInertialSensorService);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_