Remove const from `const int loops`.

bench/ShaderMaskBench.cpp

Index: bench/ShaderMaskBench.cpp
diff --git a/bench/ShaderMaskBench.cpp b/bench/ShaderMaskBench.cpp
index 32805352fc6c3b539bdd0384e83ea7d506878deb..eb77cbfa203302b45d1b9f1fcbf717bc66bef798 100644
--- a/bench/ShaderMaskBench.cpp
+++ b/bench/ShaderMaskBench.cpp
@@ -54,7 +54,7 @@ protected:
         return fName.c_str();
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) {
+    virtual void onDraw(int loops, SkCanvas* canvas) {
         const SkIPoint dim = this->getSize();
         SkRandom rand;