Turn SkCanvasStateUtils into a class with static functions.

gm/beziers.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkRandom.h"
 
 #define W   400
 #define H   400
 #define N   10
 
-static const SkScalar SW = SkIntToScalar(W);
 static const SkScalar SH = SkIntToScalar(H);
 
 static void rnd_quad(SkPath* p, SkPaint* paint, SkLCGRandom& rand) {
     p->moveTo(rand.nextRangeScalar(0,  W), rand.nextRangeScalar(0,  H));
     for (int x = 0; x < 2; ++x) {
         p->quadTo(rand.nextRangeScalar(W / 4,  W), rand.nextRangeScalar(0,  H),
                 rand.nextRangeScalar(0,  W), rand.nextRangeScalar(H / 4,  H));
     }
     paint->setColor(rand.nextU());
     SkScalar width = rand.nextRangeScalar(1, 5);
@@ skipping 52 matching lines @@
             canvas->drawPath(p, paint);
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 static skiagm::GM* F0(void*) { return new BeziersGM; }
 static skiagm::GMRegistry R0(F0);