Port SkBlurImage opts to SkOpts.

src/opts/SkOpts_sse2.cpp

Index: src/opts/SkOpts_sse2.cpp
diff --git a/src/opts/SkOpts_sse2.cpp b/src/opts/SkOpts_sse2.cpp
index d80c6ff3523fcf600b37df485a25a2a8c8ea4643..5b4d6d686f2466f1a974cddde3731bcff79a801c 100644
--- a/src/opts/SkOpts_sse2.cpp
+++ b/src/opts/SkOpts_sse2.cpp
@@ -6,6 +6,9 @@
  */
 
 #include "SkOpts.h"
+
+#define SK_OPTS_NS sse2
+#include "SkBlurImageFilter_opts.h"
 #include "SkXfermode_opts.h"
 
 namespace sse2 {  // This helps identify methods from this file when debugging / profiling.
@@ -53,5 +56,10 @@ namespace SkOpts {
         memset16        = sse2::memset16;
         memset32        = sse2::memset32;
         create_xfermode = SkCreate4pxXfermode;
+
+        static const auto x = sse2::kX, y = sse2::kY;
+        box_blur_xx = sse2::box_blur<x,x>;
+        box_blur_xy = sse2::box_blur<x,y>;
+        box_blur_yx = sse2::box_blur<y,x>;
     }
 }