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

bench/PathUtilsBench.cpp

Index: bench/PathUtilsBench.cpp
diff --git a/bench/PathUtilsBench.cpp b/bench/PathUtilsBench.cpp
index a021f22f681836e8b988df63cfe10a41d7884f29..613d49aa41bd3967428214feeff9dfe79e1a519b 100644
--- a/bench/PathUtilsBench.cpp
+++ b/bench/PathUtilsBench.cpp
@@ -18,7 +18,7 @@
 //this function is redefined for sample, test, and bench. is there anywhere
 // I can put it to avoid code duplcation?
 static void fillRandomBits( int chars, char* bits ){
-    SkMWCRandom rand(SkTime::GetMSecs());
+    SkRandom rand(SkTime::GetMSecs());
 
     for (int i = 0; i < chars; ++i){
         bits[i] = rand.nextU();