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

src/gpu/effects/GrSimpleTextureEffect.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 "GrSimpleTextureEffect.h"
 #include "gl/GrGLEffect.h"
 #include "gl/GrGLEffectMatrix.h"
@@ skipping 85 matching lines @@
 }
 
 const GrBackendEffectFactory& GrSimpleTextureEffect::getFactory() const {
     return GrTBackendEffectFactory<GrSimpleTextureEffect>::getInstance();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GR_DEFINE_EFFECT_TEST(GrSimpleTextureEffect);
 
-GrEffectRef* GrSimpleTextureEffect::TestCreate(SkMWCRandom* random,
+GrEffectRef* GrSimpleTextureEffect::TestCreate(SkRandom* random,
                                                GrContext*,
                                                const GrDrawTargetCaps&,
                                                GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
                                       GrEffectUnitTest::kAlphaTextureIdx;
     static const SkShader::TileMode kTileModes[] = {
         SkShader::kClamp_TileMode,
         SkShader::kRepeat_TileMode,
         SkShader::kMirror_TileMode,
     };
@@ skipping 11 matching lines @@
     };
     CoordsType coordsType = kCoordsTypes[random->nextULessThan(GR_ARRAY_COUNT(kCoordsTypes))];
 
     if (kCustom_CoordsType == coordsType) {
         return GrSimpleTextureEffect::CreateWithCustomCoords(textures[texIdx], params);
     } else {
         const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
         return GrSimpleTextureEffect::Create(textures[texIdx], matrix);
     }
 }