The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c

commit 8a4778e913e038c5f5bd179d3ef64392d6ee0d3c
Author: Mikhail Pozdnyakov <mikhail.pozdnyakov@intel.com>
Date: Sat Aug 26 05:27:17 2017

[sensor][Linux] Fix fusion sensors creation

This patch fixes fusion sensor creation failure in PlatformSensorProviderLinux.
The problem was that PlatformSensorProviderLinux::CreateSensorInternal() early
returned in case device nodes were not indexed ignoring creation of fusion senor
types.

The patch also improves the PlatformSensorFusion class interface with introducing
of a factory method which enforces the clients to use async callback for
initialization PlatformSensorFusion instances.

Bug:  758498 
Change-Id: Id3e773cc770397a2ceb133a7fd88af9106e77bd3
Reviewed-on: https://chromium-review.googlesource.com/631936
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Alexander Shalamov <alexander.shalamov@intel.com>
Commit-Queue: Mikhail Pozdnyakov <mikhail.pozdnyakov@intel.com>
Cr-Commit-Position: refs/heads/master@{#497656}
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_fusion.cc
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_fusion.h
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_provider_android.cc
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_provider_linux.cc
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_provider_linux.h
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_provider_mac.cc
[modify] https://crrev.com/8a4778e913e038c5f5bd179d3ef64392d6ee0d3c/services/device/generic_sensor/platform_sensor_provider_win.cc