Add dest type hint to SkShader::ContextRec

bench/SkLinearBitmapPipelineBench.cpp

Index: bench/SkLinearBitmapPipelineBench.cpp
diff --git a/bench/SkLinearBitmapPipelineBench.cpp b/bench/SkLinearBitmapPipelineBench.cpp
index 8a4ba2cef9a0fda1e23bde7ea55d461f97747ff3..8c44fa85110051a9f0e70c183b5d73c9c63e987e 100644
--- a/bench/SkLinearBitmapPipelineBench.cpp
+++ b/bench/SkLinearBitmapPipelineBench.cpp
@@ -196,7 +196,8 @@ struct SkBitmapFPOrigShader : public CommonBitmapFPBenchmark {
         SkAutoTMalloc<SkPMColor> buffer4b(width*height);
 
         uint32_t storage[200];
-        const SkShader::ContextRec rec(fPaint, fM, nullptr);
+        const SkShader::ContextRec rec(fPaint, fM, nullptr,
+                                       SkShader::ContextRec::kPMColor_DstType);
         SkASSERT(fPaint.getShader()->contextSize(rec) <= sizeof(storage));
         SkShader::Context* ctx = fPaint.getShader()->createContext(rec, storage);