Harden LinearGradient4fContext

src/effects/gradients/SkGradientShader.cpp

Index: src/effects/gradients/SkGradientShader.cpp
diff --git a/src/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 3a28da8099501708cf9ced29befa7154207293c7..4f174d72b9f120f4bf967c6744b270cc4eb7e1a1 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -76,7 +76,7 @@ SkGradientShaderBase::SkGradientShaderBase(const Descriptor& desc, const SkMatri
     fPtsToUnit.getType();  // Precache so reads are threadsafe.
     SkASSERT(desc.fCount > 1);
 
-    fGradFlags = SkToU8(desc.fGradFlags);
+    fGradFlags = static_cast<uint8_t>(desc.fGradFlags);
 
     SkASSERT((unsigned)desc.fTileMode < SkShader::kTileModeCount);
     SkASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gTileProcs));