Remove const from `const int loops`.

bench/GMBench.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GMBench_DEFINED
 #define GMBench_DEFINED
 
 #include "Benchmark.h"
 #include "SkCanvas.h"
 #include "gm.h"
 
 /**
  * Runs a GM as a benchmark by repeatedly drawing the GM.
  */
 class GMBench : public Benchmark {
 public:
     // Constructor takes ownership of the GM param.
     GMBench(skiagm::GM* gm);
     virtual ~GMBench();
 
 protected:
     const char* onGetName() override;
     bool isSuitableFor(Backend backend) override;
-    void onDraw(const int loops, SkCanvas* canvas) override;
+    void onDraw(int loops, SkCanvas* canvas) override;
     SkIPoint onGetSize() override;
 
 private:
     skiagm::GM* fGM;
     SkString    fName;
     typedef Benchmark INHERITED;
 };
 
 #endif