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

tests/ColorTest.cpp

Index: tests/ColorTest.cpp
diff --git a/tests/ColorTest.cpp b/tests/ColorTest.cpp
index c6e5485080ce51750962dcb858beee764393c9bd..a720ff4eac5bfe8f8861e74ce39bf33e47bafaed 100644
--- a/tests/ColorTest.cpp
+++ b/tests/ColorTest.cpp
@@ -146,7 +146,7 @@ static inline void test_premul(skiatest::Reporter* reporter) {
 */
 /*
 static void test_interp(skiatest::Reporter* reporter) {
-    SkMWCRandom r;
+    SkRandom r;
 
     U8CPU a0 = 0;
     U8CPU a255 = 255;
@@ -163,7 +163,7 @@ static void test_interp(skiatest::Reporter* reporter) {
 */
 
 static inline void test_fast_interp(skiatest::Reporter* reporter) {
-    SkMWCRandom r;
+    SkRandom r;
 
     U8CPU a0 = 0;
     U8CPU a255 = 255;