Fix build failure on WinRT due to missing Sleep definition.
Fix build failure on WinRT due to missing Sleep definition.

Change-Id: I9032484dde6e690fcd175d6d76192724e5bc0357
Reviewed-on: https://chromium-review.googlesource.com/225893
Reviewed-by: Cooper Partin <77b9dcdc3e6e4de1ee920aa2cd9a10b6e936b086@microsoft.com>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Tested-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

mybios/angle,ghostoy/angle,ppy/angle,ecoal95/angle,vvuk/angle,mikolalysenko/angle,csa7mdm/angle,mrobinson/rust-angle,ecoal95/angle,mlfarrell/angle,bsergean/angle,csa7mdm/angle,larsbergstrom/angle,ghostoy/angle,mybios/angle,MSOpenTech/angle,mrobinson/rust-angle,bsergean/angle,larsbergstrom/angle,bsergean/angle,nandhanurrevanth/angle,vvuk/angle,ghostoy/angle,mlfarrell/angle,bsergean/angle,nandhanurrevanth/angle,mikolalysenko/angle,ppy/angle,mikolalysenko/angle,MSOpenTech/angle,vvuk/angle,crezefire/angle,larsbergstrom/angle,MSOpenTech/angle,mlfarrell/angle,ecoal95/angle,larsbergstrom/angle,MSOpenTech/angle,crezefire/angle,nandhanurrevanth/angle,ecoal95/angle,csa7mdm/angle,mikolalysenko/angle,crezefire/angle,ghostoy/angle,mrobinson/rust-angle,mybios/angle,csa7mdm/angle,domokit/waterfall,domokit/waterfall,mrobinson/rust-angle,mlfarrell/angle,vvuk/angle,mybios/angle,crezefire/angle,ppy/angle,mrobinson/rust-angle,ecoal95/angle,nandhanurrevanth/angle,ppy/angle