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

bench/ChecksumBench.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 "SkChecksum.h"
 #include "SkMD5.h"
@@ skipping 12 matching lines @@
     enum {
         U32COUNT  = 256,
         SIZE      = U32COUNT * 4,
         N         = SkBENCHLOOP(100000),
     };
     uint32_t    fData[U32COUNT];
     ChecksumType fType;
 
 public:
     ComputeChecksumBench(void* param, ChecksumType type) : INHERITED(param), fType(type) {
-        SkMWCRandom rand;
+        SkRandom rand;
         for (int i = 0; i < U32COUNT; ++i) {
             fData[i] = rand.nextU();
         }
         fIsRendering = false;
     }
 
 protected:
     virtual const char* onGetName() {
         switch (fType) {
             case kChecksum_ChecksumType: return "compute_checksum";
@@ skipping 48 matching lines @@
 static SkBenchmark* Fact0(void* p) { return new ComputeChecksumBench(p, kChecksum_ChecksumType); }
 static SkBenchmark* Fact1(void* p) { return new ComputeChecksumBench(p, kMD5_ChecksumType); }
 static SkBenchmark* Fact2(void* p) { return new ComputeChecksumBench(p, kSHA1_ChecksumType); }
 static SkBenchmark* Fact3(void* p) { return new ComputeChecksumBench(p, kMurmur3_ChecksumType); }
 
 
 static BenchRegistry gReg0(Fact0);
 static BenchRegistry gReg1(Fact1);
 static BenchRegistry gReg2(Fact2);
 static BenchRegistry gReg3(Fact3);