Add loopSKP flag to nanobench

bench/SKPAnimationBench.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SKPAnimationBench_DEFINED
 #define SKPAnimationBench_DEFINED
 
 #include "SKPBench.h"
 
 /**
  * Runs an SkPicture as a benchmark by repeatedly drawing it, first centering the picture and
  * for each step it concats the passed in matrix
  */
 class SKPAnimationBench : public SKPBench {
 public:
     SKPAnimationBench(const char* name, const SkPicture*, const SkIRect& devClip,
-                      SkMatrix viewMatrix, int steps);
+                      SkMatrix viewMatrix, int steps, bool doLooping);
 
 protected:
     const char* onGetName() override;
     const char* onGetUniqueName() override;
     void onPerCanvasPreDraw(SkCanvas* canvas) override;
 
     void drawMPDPicture() override {
         SkFAIL("MPD not supported\n");
     }
     void drawPicture() override;
 
 private:
     int fSteps;
     SkMatrix fAnimationMatrix;
     SkString fName;
     SkString fUniqueName;
     SkPoint fCenter;
 
     typedef SKPBench INHERITED;
 };
 
 #endif