Port convolve functions to SkOpts

src/core/SkOpts.cpp

Index: src/core/SkOpts.cpp
diff --git a/src/core/SkOpts.cpp b/src/core/SkOpts.cpp
index 6648909d1a94521230e45d6a13c310306f7765ed..6c13dd05e1c245d1c038a10ee25705407a8c0da2 100644
--- a/src/core/SkOpts.cpp
+++ b/src/core/SkOpts.cpp
@@ -36,6 +36,7 @@
     #define SK_OPTS_NS portable
 #endif
 
+#include "SkBitmapFilter_opts.h"
 #include "SkBlend_opts.h"
 #include "SkBlitMask_opts.h"
 #include "SkBlitRow_opts.h"
@@ -90,6 +91,11 @@ namespace SkOpts {
     DEFINE_DEFAULT(hash_fn);
 
     DEFINE_DEFAULT(compile_pipeline);
+
+    DEFINE_DEFAULT(convolve_vertically);
+    DEFINE_DEFAULT(convolve_horizontally);
+    DEFINE_DEFAULT(convolve_4_rows_horizontally);
+
 #undef DEFINE_DEFAULT
 
     // Each Init_foo() is defined in src/opts/SkOpts_foo.cpp.