[sensors] Fix crash after 85cc22d when using async creation of sensors.

device/generic_sensor/sensor_provider_impl.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/sensor_provider_impl.h"
 
 #include <utility>
 
 #include "device/generic_sensor/platform_sensor_provider.h"
 #include "device/generic_sensor/sensor_impl.h"
@@ skipping 78 matching lines @@
   }
 
   auto sensor_impl = base::MakeUnique<SensorImpl>(sensor);
 
   auto init_params = mojom::SensorInitParams::New();
   init_params->memory = std::move(cloned_handle);
   init_params->buffer_offset = GetBufferOffset(type);
   init_params->mode = sensor->GetReportingMode();
   init_params->default_configuration = sensor->GetDefaultConfiguration();
 
+  NotifySensorCreated(std::move(init_params), sensor_impl.get(), callback);

[timvolodine, 2016/10/05 17:59:35]

is the order of Notify and MakeStrongBinding important here?

+
   mojo::MakeStrongBinding(std::move(sensor_impl), std::move(sensor_request));
-
-  NotifySensorCreated(nullptr, nullptr, callback);
 }
 
 }  // namespace device