Fix the indirect pure virtual calls in DataFetcherSharedMemoryBase destructor.

content/browser/device_sensors/data_fetcher_shared_memory_default.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 "base/logging.h"
 #include "base/metrics/histogram.h"
 
 namespace {
@@ skipping 20 matching lines @@
 
 }  // namespace
 
 namespace content {
 
 DataFetcherSharedMemory::DataFetcherSharedMemory()
     : motion_buffer_(NULL), orientation_buffer_(NULL) {
 }
 
 DataFetcherSharedMemory::~DataFetcherSharedMemory() {
+  StopFetchingAllDeviceData();
 }
 
 bool DataFetcherSharedMemory::Start(ConsumerType consumer_type, void* buffer) {
   DCHECK(buffer);
 
   switch (consumer_type) {
     case CONSUMER_TYPE_MOTION:
       motion_buffer_ = static_cast<DeviceMotionHardwareBuffer*>(buffer);
       UMA_HISTOGRAM_BOOLEAN("InertialSensor.MotionDefaultAvailable", false);
       return SetMotionBuffer(motion_buffer_, true);
@@ skipping 15 matching lines @@
       return SetMotionBuffer(motion_buffer_, false);
     case CONSUMER_TYPE_ORIENTATION:
       return SetOrientationBuffer(orientation_buffer_, false);
     default:
       NOTREACHED();
   }
   return false;
 }
 
 }  // namespace content