Use SkMWRandom in GLPrograms test.

R=jvanverth@google.com
Review URL: https://codereview.appspot.com/7306097

git-svn-id: http://skia.googlecode.com/svn/trunk@7721 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/effects/GrConvolutionEffect.cpp b/src/gpu/effects/GrConvolutionEffect.cpp
index 8968857..12c32f0 100644
--- a/src/gpu/effects/GrConvolutionEffect.cpp
+++ b/src/gpu/effects/GrConvolutionEffect.cpp
@@ -178,7 +178,7 @@
 
 GR_DEFINE_EFFECT_TEST(GrConvolutionEffect);
 
-GrEffectRef* GrConvolutionEffect::TestCreate(SkRandom* random,
+GrEffectRef* GrConvolutionEffect::TestCreate(SkMWCRandom* random,
                                              GrContext* context,
                                              GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :