Switch out random number generator for tests, benches, samples.

bench/SortBench.cpp

Index: bench/SortBench.cpp
diff --git a/bench/SortBench.cpp b/bench/SortBench.cpp
index c19ebae0c8ff21554ec22ceb44b46fd099c84292..3e4637780d943a470dbcb15f1618de777d7cdb9a 100644
--- a/bench/SortBench.cpp
+++ b/bench/SortBench.cpp
@@ -13,14 +13,14 @@
 static const int N = 1000;
 
 static void rand_proc(int array[], int count) {
-    SkRandom rand;
+    SkMWCRandom rand;
     for (int i = 0; i < count; ++i) {
         array[i] = rand.nextS();
     }
 }
 
 static void randN_proc(int array[], int count) {
-    SkRandom rand;
+    SkMWCRandom rand;
     int mod = N / 10;
     for (int i = 0; i < count; ++i) {
         array[i] = rand.nextU() % mod;