Remove const from `const int loops`.

bench/GradientBench.cpp

Index: bench/GradientBench.cpp
diff --git a/bench/GradientBench.cpp b/bench/GradientBench.cpp
index 705099db1c2cc586f6937a48761e7bec308d11e5..53b9e95fff50841be1fc62f31606b5ffb8b58978 100644
--- a/bench/GradientBench.cpp
+++ b/bench/GradientBench.cpp
@@ -248,7 +248,7 @@ 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);
 
@@ -337,7 +337,7 @@ 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);