Change old PRG to be SkLCGRandom; change new one to SkRandom

bench/MatrixConvolutionBench.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkBenchmark.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
@@ skipping 21 matching lines @@
 
 protected:
     virtual const char* onGetName() {
         return fName.c_str();
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkPaint paint;
         this->setupPaint(&paint);
         paint.setAntiAlias(true);
-        SkMWCRandom rand;
+        SkRandom rand;
         for (int i = 0; i < SkBENCHLOOP(3); i++) {
             SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400,
                                       rand.nextUScalar1() * 400);
             paint.setImageFilter(fFilter);
             canvas->drawOval(r, paint);
         }
     }
 
 private:
     typedef SkBenchmark INHERITED;
     SkMatrixConvolutionImageFilter* fFilter;
     SkString fName;
 };
 
 static SkBenchmark* Fact00(void* p) { return new MatrixConvolutionBench(p, SkMatrixConvolutionImageFilter::kClamp_TileMode, true); }
 static SkBenchmark* Fact01(void* p) { return new MatrixConvolutionBench(p, SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); }
 static SkBenchmark* Fact02(void* p) { return new MatrixConvolutionBench(p, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); }
 static SkBenchmark* Fact03(void* p) { return new MatrixConvolutionBench(p, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); }
 
 static BenchRegistry gReg00(Fact00);
 static BenchRegistry gReg01(Fact01);
 static BenchRegistry gReg02(Fact02);
 static BenchRegistry gReg03(Fact03);