Removing useless Win7 checks + standardize its use

device/sensors/data_fetcher_shared_memory_win.cc

 // 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.
 
 #include "device/sensors/data_fetcher_shared_memory.h"
 
 #include <GuidDef.h>
 #include <InitGuid.h>
 #include <PortableDeviceTypes.h>
 #include <Sensors.h>
 #include <objbase.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/win/iunknown_impl.h"
-#include "base/win/windows_version.h"
 
 namespace {
 
 const double kMeanGravity = 9.80665;
 
 }  // namespace
 
 namespace device {
 
 class DataFetcherSharedMemory::SensorEventSink
@@ skipping 278 matching lines @@
     default:
       NOTREACHED();
   }
   return false;
 }
 
 bool DataFetcherSharedMemory::RegisterForSensor(
     REFSENSOR_TYPE_ID sensor_type,
     ISensor** sensor,
     scoped_refptr<SensorEventSink> event_sink) {
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return false;
-
   base::win::ScopedComPtr<ISensorManager> sensor_manager;
   HRESULT hr = ::CoCreateInstance(CLSID_SensorManager, nullptr, CLSCTX_ALL,
                                   IID_PPV_ARGS(&sensor_manager));
   if (FAILED(hr) || !sensor_manager.Get())
     return false;
 
   base::win::ScopedComPtr<ISensorCollection> sensor_collection;
   hr = sensor_manager->GetSensorsByType(sensor_type,
                                         sensor_collection.GetAddressOf());
 
@@ skipping 87 matching lines @@
         motion_buffer_->data.all_available_sensors_are_active = enabled;
         motion_buffer_->seqlock.WriteEnd();
       }
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace device