Remove const from `const int loops`.

bench/MorphologyBench.cpp

Index: bench/MorphologyBench.cpp
diff --git a/bench/MorphologyBench.cpp b/bench/MorphologyBench.cpp
index 972892b53ad1d2b3e98eef6e84a5b86ef19a72ca..51da197e152b779a3213def82f545692e6f1ada5 100644
--- a/bench/MorphologyBench.cpp
+++ b/bench/MorphologyBench.cpp
@@ -50,7 +50,7 @@ protected:
         return fName.c_str();
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) {
+    virtual void onDraw(int loops, SkCanvas* canvas) {
         SkPaint paint;
         this->setupPaint(&paint);