[sensors](CrOS/Linux) Rename SensorDeviceManager cc and h files.

device/generic_sensor/platform_sensor_provider_linux.cc

 // Copyright 2016 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/generic_sensor/platform_sensor_provider_linux.h"
 
 #include "base/memory/singleton.h"
 #include "base/threading/thread.h"
 #include "device/generic_sensor/linux/sensor_data_linux.h"
 #include "device/generic_sensor/platform_sensor_linux.h"
@@ skipping 184 matching lines @@
     return;
   }
   sensor_devices_by_type_[type] = std::move(sensor_device);
 }
 
 void PlatformSensorProviderLinux::OnDeviceRemoved(
     mojom::SensorType type,
     const std::string& device_node) {
   DCHECK(CalledOnValidThread());
   auto it = sensor_devices_by_type_.find(type);
-  if (it == sensor_devices_by_type_.end() &&
+  if (it != sensor_devices_by_type_.end() &&
       it->second->device_node == device_node)
     sensor_devices_by_type_.erase(it);
 }
 
 }  // namespace device