Move uses of functions taking SkColorType to GrColorType versions in GrCaps.

Change-Id: I4feda6277cf14be0d32a8ce22257902483d7ae1a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225734
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrClipStackClip.cpp b/src/gpu/GrClipStackClip.cpp
index 6e455d5..3c282d5 100644
--- a/src/gpu/GrClipStackClip.cpp
+++ b/src/gpu/GrClipStackClip.cpp
@@ -495,7 +495,7 @@
         desc.fConfig = kAlpha_8_GrPixelConfig;
 
         GrBackendFormat format =
-                context->priv().caps()->getBackendFormatFromColorType(kAlpha_8_SkColorType);
+                context->priv().caps()->getBackendFormatFromColorType(GrColorType::kAlpha_8);
 
         // MDB TODO: We're going to fill this proxy with an ASAP upload (which is out of order wrt
         // to ops), so it can't have any pending IO.