This reverts commit 20c97cac
and adds a few trivial changes to make it build with the current version
of ANGLE code.

Please see https://bugs.chromium.org/p/chromium/issues/detail?id=614147
for more details on how this extension will be used.

Original description:

This change adds implementation of eglGetSyncValuesCHROMIUM extension
on D3D11 with Direct Composition. This should work on Windows 8.1 and
above.

The implementation is based on IDXGISwapChain::GetFrameStatistics.

Extension documentation:
https://chromium.googlesource.com/chromium/src/gpu/+/master/GLES2/extensions/CHROMIUM/EGL_CHROMIUM_get_sync_values.txt

BUG=angleproject:1402

Change-Id: I4b77899f31a4c4cf1fa7f20ab12de5a02ccf74d8
Reviewed-on: https://chromium-review.googlesource.com/459217
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>