Port SkBlitRow::Color32 to SkOpts.

src/opts/SkBlitRow_opts_arm_neon.cpp

Index: src/opts/SkBlitRow_opts_arm_neon.cpp
diff --git a/src/opts/SkBlitRow_opts_arm_neon.cpp b/src/opts/SkBlitRow_opts_arm_neon.cpp
index d5260afd503319a55243213e06147423b03a4e3c..1f97971ee48ab99fb23c8ae47fc44a81f23fe478 100644
--- a/src/opts/SkBlitRow_opts_arm_neon.cpp
+++ b/src/opts/SkBlitRow_opts_arm_neon.cpp
@@ -1582,20 +1582,3 @@ const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[] = {
     nullptr
 #endif
 };
-
-#include "Sk4px.h"
-
-void sk_blitrow_color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count, SkPMColor color) {
-    // Until it becomes a little more reasonable to assume we'll be built with NEON,
-    // we copy our Sk4px implementation of SkBlitRow::Color32 here so it picks up NEON at runtime.
-    unsigned invA = 255 - SkGetPackedA32(color);
-    invA += invA >> 7;
-    SkASSERT(invA < 256);  // Our caller has already handled the alpha == 0 case.
-
-    Sk16h colorHighAndRound = Sk4px::DupPMColor(color).widenHi() + Sk16h(128);
-    Sk16b invA_16x(invA);
-
-    Sk4px::MapSrc(count, dst, src, [&](const Sk4px& src4) -> Sk4px {
-        return (src4 * invA_16x).addNarrowHi(colorHighAndRound);
-    });
-}