Explicitly set the swap effect.
Explicitly set the swap effect.

swapChainDesc.SwapEffect wasn't being set. The whole structure was initialized
to 0 and DXGI_SWAP_EFFECT_DISCARD has value 0 so this should have no effect.
Also sorted the field initialization in the order they're declared.

BUG=373360

Change-Id: If0113e7468c0bad024a07fec6ad9e223e19494b5
Reviewed-on: https://chromium-review.googlesource.com/200046
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Tested-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@chromium.org>

bsergean/angle,nandhanurrevanth/angle,csa7mdm/angle,crezefire/angle,crezefire/angle,bsergean/angle,android-ia/platform_external_chromium_org_third_party_angle,mikolalysenko/angle,mlfarrell/angle,nandhanurrevanth/angle,xin3liang/platform_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,mybios/angle,mlfarrell/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,ecoal95/angle,MIPS/external-chromium_org-third_party-angle,mrobinson/rust-angle,ppy/angle,nandhanurrevanth/angle,mikolalysenko/angle,csa7mdm/angle,MIPS/external-chromium_org-third_party-angle,ppy/angle,mybios/angle,MIPS/external-chromium_org-third_party-angle,android-ia/platform_external_chromium_org_third_party_angle,vvuk/angle,mrobinson/rust-angle,jgcaaprom/android_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,vvuk/angle,mybios/angle,jgcaaprom/android_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,ghostoy/angle,mlfarrell/angle,mikolalysenko/angle,csa7mdm/angle,MSOpenTech/angle,larsbergstrom/angle,ecoal95/angle,android-ia/platform_external_chromium_org_third_party_angle,larsbergstrom/angle,mybios/angle,ecoal95/angle,nandhanurrevanth/angle,xin3liang/platform_external_chromium_org_third_party_angle,mrobinson/rust-angle,csa7mdm/angle,crezefire/angle,domokit/waterfall,larsbergstrom/angle,ecoal95/angle,bsergean/angle,MSOpenTech/angle,jgcaaprom/android_external_chromium_org_third_party_angle,larsbergstrom/angle,ppy/angle,crezefire/angle,MSOpenTech/angle,bsergean/angle,vvuk/angle,ppy/angle,mikolalysenko/angle,ghostoy/angle,mrobinson/rust-angle,mlfarrell/angle,domokit/waterfall,ghostoy/angle,ecoal95/angle,vvuk/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,mrobinson/rust-angle,xin3liang/platform_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,xin3liang/platform_external_chromium_org_third_party_angle,ghostoy/angle,MSOpenTech/angle,android-ia/platform_external_chromium_org_third_party_angle