converted ConstColorProcessor to SkSL

Bug: skia:
Change-Id: Ic3b18f82c1ab940637fb26dec1cf376dd859b35d
Reviewed-on: https://skia-review.googlesource.com/73720
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/shaders/SkComposeShader.cpp b/src/shaders/SkComposeShader.cpp
index a587f52..34e5486 100644
--- a/src/shaders/SkComposeShader.cpp
+++ b/src/shaders/SkComposeShader.cpp
@@ -129,7 +129,7 @@
         SkASSERT(fMode != SkBlendMode::kSrc && fMode != SkBlendMode::kDst); // caught in factory
         if (fMode == SkBlendMode::kClear) {
             return GrConstColorProcessor::Make(GrColor4f::TransparentBlack(),
-                                               GrConstColorProcessor::kIgnore_InputMode);
+                                               GrConstColorProcessor::InputMode::kIgnore);
         }
     }