GitLab

PlatformSensorReaderWinrtLightSensor

As the third step for implementing usage of the
Windows.Devices.Sensors WinRT API in Chromium, this CL:
  - Implements PlatformSensorReaderWinrtBase, the base class
    used to implement all of the Windows.Devices.Sensors based
    PlatformSensorReaders.
  - Implements PlatformSensorReaderWinrtLightSensor, the derived
    class of PlatformSensorReaderWinrtBase which adds support
    for light sensors using Windows.Devices.Sensors.LightSensor.
There is heavy use of templates since the Windows.Devices.Sensors
API is strongly typed.

Verified functionally by:
  - Built chrome.exe.
  - Ran chrome.exe on laptop with light sensor.
  - Navigated to website that polls the W3C light sensor:
    - Verified light sensor could be polled with WinRT feature
      flag on and off.
  - Ran chrome.exe on laptop without light sensor.
  - Navigated to website that polls the W3C light sensor:
    - Verified the light sensor failed to instantiate with the
      WinRT feature flag on and off.
Also ran new PlatformSensorReaderTestWinrt unit tests.

Bug: 958266
Change-Id: Iaa69d92f9e7923099653b4f554efc2852162b53f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1703327
Commit-Queue: Wenjie Shi <wensh@microsoft.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683005}