Remove const from `const int loops`.

bench/ImageFilterCollapse.cpp

Index: bench/ImageFilterCollapse.cpp
diff --git a/bench/ImageFilterCollapse.cpp b/bench/ImageFilterCollapse.cpp
index 010149b2bcbf64f406bd48dbf1ddcbf049b98ced..2a2fa3a7d4b46d98f6cbb626c63aba14c1bc157a 100644
--- a/bench/ImageFilterCollapse.cpp
+++ b/bench/ImageFilterCollapse.cpp
@@ -39,7 +39,7 @@ protected:
         }
     }
 
-    void onDraw(const int loops, SkCanvas* canvas) override {
+    void onDraw(int loops, SkCanvas* canvas) override {
         makeBitmap();
 
         for(int i = 0; i < loops; i++) {