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/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 6c95374..261ad8f 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -870,7 +870,7 @@
     }
 }
 
-int GrGradientEffect::RandomGradientParams(SkRandom* random,
+int GrGradientEffect::RandomGradientParams(SkMWCRandom* random,
                                            SkColor colors[],
                                            SkScalar** stops,
                                            SkShader::TileMode* tm) {