Move core pieces of geolocation from chrome to content....

chrome/browser/geolocation/empty_device_data_provider.h

-// Copyright (c) 2010 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 CHROME_BROWSER_GEOLOCATION_EMPTY_DEVICE_DATA_PROVIDER_H_
-#define CHROME_BROWSER_GEOLOCATION_EMPTY_DEVICE_DATA_PROVIDER_H_
-#pragma once
-
-#include "chrome/browser/geolocation/device_data_provider.h"
-
-// An implementation of DeviceDataProviderImplBase that does not provide any
-// data. Used on platforms where a given data type is not available.
-
-template<typename DataType>
-class EmptyDeviceDataProvider : public DeviceDataProviderImplBase<DataType> {
- public:
-  EmptyDeviceDataProvider() {}
-  virtual ~EmptyDeviceDataProvider() {}
-
-  // DeviceDataProviderImplBase implementation
-  virtual bool StartDataProvider() { return true; }
-  virtual void StopDataProvider() { }
-  virtual bool GetData(DataType *data) {
-    DCHECK(data);
-    // This is all the data we can get - nothing.
-    return true;
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(EmptyDeviceDataProvider);
-};
-
-#endif  // CHROME_BROWSER_GEOLOCATION_EMPTY_DEVICE_DATA_PROVIDER_H_