fix some clangtidy warnings

unnecessary copies in for loop

Bug: skia:
Change-Id: I494daa2524f3cd75b934572a4ecd0ff4b18ac8a9
Reviewed-on: https://skia-review.googlesource.com/105741
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/gm/shadermaskfilter.cpp b/gm/shadermaskfilter.cpp
index 4fc2cdad63..d561967cd8 100644
--- a/gm/shadermaskfilter.cpp
+++ b/gm/shadermaskfilter.cpp
@@ -199,11 +199,11 @@ DEF_SIMPLE_GM(savelayer_maskfilter, canvas, 450, 675) {
     // as cpu and gpu backends treat these differently (w/ or w/o a SkSpecialImage)
     const sk_sp<SkImageFilter> imfs[] = {nullptr, SkBlurImageFilter::Make(3.5f, 3.5f, nullptr)};
 
-    for (auto mf : mfs) {
+    for (auto& mf : mfs) {
         SkPaint layerPaint;
         layerPaint.setMaskFilter(mf);
         canvas->save();
-        for (auto imf : imfs) {
+        for (auto& imf : imfs) {
             layerPaint.setImageFilter(imf);
 
             canvas->saveLayer(&r, &layerPaint);