Fix the indirect pure virtual calls in DataFetcherSharedMemoryBase destructor.

content/browser/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 "data_fetcher_shared_memory.h"
 
 #include <GuidDef.h>
 #include <InitGuid.h>
 #include <PortableDeviceTypes.h>
 #include <Sensors.h>
@@ skipping 211 matching lines @@
    DISALLOW_COPY_AND_ASSIGN(SensorEventSinkMotion);
  };
 
 
 DataFetcherSharedMemory::DataFetcherSharedMemory()
     : motion_buffer_(NULL),
       orientation_buffer_(NULL) {
 }
 
 DataFetcherSharedMemory::~DataFetcherSharedMemory() {
+  StopFetchingAllDeviceData();
 }
 
 DataFetcherSharedMemory::FetcherType DataFetcherSharedMemory::GetType() const {
   return FETCHER_TYPE_SEPARATE_THREAD;
 }
 
 bool DataFetcherSharedMemory::Start(ConsumerType consumer_type, void* buffer) {
   DCHECK(buffer);
 
   switch (consumer_type) {
@@ skipping 149 matching lines @@
         motion_buffer_->data.allAvailableSensorsAreActive = enabled;
         motion_buffer_->seqlock.WriteEnd();
       }
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace content