Update SkOpts namespaces.

src/opts/SkBlurImageFilter_opts.h

Index: src/opts/SkBlurImageFilter_opts.h
diff --git a/src/opts/SkBlurImageFilter_opts.h b/src/opts/SkBlurImageFilter_opts.h
index f62604ca0896347bbc5e3b6c7b37c4c25b9ba351..497bcde33f1d2b187090e6a6648d76d273838e61 100644
--- a/src/opts/SkBlurImageFilter_opts.h
+++ b/src/opts/SkBlurImageFilter_opts.h
@@ -88,8 +88,9 @@ static inline __m128i mullo_epi32(__m128i a, __m128i b) {
 
 // Fast path for kernel sizes between 2 and 127, working on two rows at a time.
 template<BlurDirection srcDirection, BlurDirection dstDirection>
-int box_blur_double(const SkPMColor** src, int srcStride, const SkIRect& srcBounds, SkPMColor** dst, int kernelSize,
-                     int leftOffset, int rightOffset, int width, int height) {
+static int box_blur_double(const SkPMColor** src, int srcStride, const SkIRect& srcBounds,
+                           SkPMColor** dst, int kernelSize,
+                           int leftOffset, int rightOffset, int width, int height) {
     // Load 2 pixels from adjacent rows.
     auto load_2_pixels = [&](const SkPMColor* s) {
         if (srcDirection == BlurDirection::kX) {