[ImageCapture] Wire in Exposure Time constraint on Windows.

We were querying the exposure time control but setting exposure
compensation. In this CL, we correct it by using ExposureTime.

Works with DirectShow backend, so we have to pass
--disable-features=MediaFoundationVideoCapture to chrome.

Test Page: https://codepen.io/rijuB/pen/gjapBo
or https://riju.github.io/WebCamera/samples/

Bug: 823316
Change-Id: I208cc557c8336b1fd2fbb48a9613c35ee04f5ed6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1599590
Reviewed-by: Tommi <tommi@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Cr-Commit-Position: refs/heads/master@{#660888}
1 file changed