Remove const from `const int loops`.

bench/MergeBench.cpp

Index: bench/MergeBench.cpp
diff --git a/bench/MergeBench.cpp b/bench/MergeBench.cpp
index 404f6461b5de7b98aa4ee1f3491f9a73a2df20d2..925b6b2bfe869070070f8f0d488b10b5123cc270 100644
--- a/bench/MergeBench.cpp
+++ b/bench/MergeBench.cpp
@@ -33,7 +33,7 @@ protected:
         }
     }
 
-    void onDraw(const int loops, SkCanvas* canvas) override {
+    void onDraw(int loops, SkCanvas* canvas) override {
         SkRect r = fIsSmall ? SkRect::MakeWH(FILTER_WIDTH_SMALL, FILTER_HEIGHT_SMALL) :
                               SkRect::MakeWH(FILTER_WIDTH_LARGE, FILTER_HEIGHT_LARGE);
         SkPaint paint;