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

samplecode/SampleApp.cpp

Index: samplecode/SampleApp.cpp
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 5188588706fa5e48c1995cbdedc17d4326173223..b3632f840ff0d7e8f6473bcb9adfb40faa818422 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -2435,7 +2435,7 @@ template <typename T> void SkTBSort(T array[], int count) {
 
 #include "SkRandom.h"
 
-static void rand_rect(SkIRect* rect, SkMWCRandom& rand) {
+static void rand_rect(SkIRect* rect, SkRandom& rand) {
     int bits = 8;
     int shift = 32 - bits;
     rect->set(rand.nextU() >> shift, rand.nextU() >> shift,
@@ -2499,7 +2499,7 @@ static void test() {
         test_rects(gRecs[i].fRects, gRecs[i].fCount);
     }
 
-    SkMWCRandom rand;
+    SkRandom rand;
     for (i = 0; i < 10000; i++) {
         SkRegion rgn0, rgn1;