Fix the indirect pure virtual calls in DataFetcherSharedMemoryBase destructor.

content/browser/device_sensors/device_inertial_sensor_service.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 "content/browser/device_sensors/device_inertial_sensor_service.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "content/browser/device_sensors/data_fetcher_shared_memory.h"
@@ skipping 68 matching lines @@
 }
 
 base::SharedMemoryHandle
 DeviceInertialSensorService::GetSharedMemoryHandleForProcess(
     ConsumerType consumer_type, base::ProcessHandle handle) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return data_fetcher_->GetSharedMemoryHandleForProcess(consumer_type, handle);
 }
 
 void DeviceInertialSensorService::Shutdown() {
-  data_fetcher_.reset();
+  if (data_fetcher_) {
+    data_fetcher_->StopFetchingAllDeviceData();
+    data_fetcher_.reset();
+  }
   is_shutdown_ = true;
 }
 
 void DeviceInertialSensorService::SetDataFetcherForTesting(
     DataFetcherSharedMemory* test_data_fetcher) {
+  if (data_fetcher_)
+    data_fetcher_->StopFetchingAllDeviceData();
   data_fetcher_.reset(test_data_fetcher);
 }
 
 }  // namespace content