Remove a usage of GrPixelConfig in SkGpuBlurUtils::GaussianBlur (take 2)

Bug: skia:6718
Change-Id: I6a0be1cab5543c3d76a041fcdc9ae9be4a3b179b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/242822
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/core/SkMaskFilterBase.h b/src/core/SkMaskFilterBase.h
index 3054094..3c06f1b 100644
--- a/src/core/SkMaskFilterBase.h
+++ b/src/core/SkMaskFilterBase.h
@@ -16,6 +16,10 @@
 #include "include/private/SkNoncopyable.h"
 #include "src/core/SkMask.h"
 
+#if SK_SUPPORT_GPU
+#include "include/private/GrTypesPriv.h"
+#endif
+
 class GrClip;
 struct GrFPArgs;
 class GrFragmentProcessor;
@@ -124,6 +128,8 @@
      */
     virtual sk_sp<GrTextureProxy> filterMaskGPU(GrRecordingContext*,
                                                 sk_sp<GrTextureProxy> srcProxy,
+                                                GrColorType srcColorType,
+                                                SkAlphaType srcAlphaType,
                                                 const SkMatrix& ctm,
                                                 const SkIRect& maskRect) const;
 #endif