Prefer glDepthRangef and glClearDepthf to the double version.
Prefer glDepthRangef and glClearDepthf to the double version.

ES only has the float versions.

BUG=angleproject:1145

Change-Id: I6c96b553d20e8aa160f68fe1b3fa0200d64108a3
Reviewed-on: https://chromium-review.googlesource.com/296361
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Tested-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

mikolalysenko/angle,mlfarrell/angle,csa7mdm/angle,csa7mdm/angle,ppy/angle,vvuk/angle,vvuk/angle,MSOpenTech/angle,mlfarrell/angle,ppy/angle,csa7mdm/angle,mikolalysenko/angle,domokit/waterfall,mybios/angle,mybios/angle,ppy/angle,ecoal95/angle,mlfarrell/angle,MSOpenTech/angle,MSOpenTech/angle,crezefire/angle,mybios/angle,mybios/angle,crezefire/angle,mikolalysenko/angle,ecoal95/angle,crezefire/angle,vvuk/angle,vvuk/angle,MSOpenTech/angle,ecoal95/angle,ecoal95/angle,mlfarrell/angle,domokit/waterfall,ppy/angle,mikolalysenko/angle,csa7mdm/angle,crezefire/angle,ecoal95/angle