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

The goal here is to get people to start using the new random number
generator, while leaving the old one in place so we don't have to 
rebaseline GMs.

R=reed@google.com, bsalomon@google.com

Author: jvanverth@google.com

Review URL: https://chromiumcodereview.appspot.com/23576015

git-svn-id: http://skia.googlecode.com/svn/trunk@11169 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/PathTest.cpp b/tests/PathTest.cpp
index ed80d41..080ce28 100644
--- a/tests/PathTest.cpp
+++ b/tests/PathTest.cpp
@@ -426,7 +426,7 @@
 // Note: PathBench::ArbRoundRectBench performs almost exactly
 // the same test (but with drawing)
 static void test_arb_round_rect_is_convex(skiatest::Reporter* reporter) {
-    SkMWCRandom rand;
+    SkRandom rand;
     SkRect r;
 
     for (int i = 0; i < 5000; ++i) {
@@ -453,7 +453,7 @@
 // Note: PathBench::ArbRoundRectBench performs almost exactly
 // the same test (but with drawing)
 static void test_arb_zero_rad_round_rect_is_rect(skiatest::Reporter* reporter) {
-    SkMWCRandom rand;
+    SkRandom rand;
     SkRect r;
 
     for (int i = 0; i < 5000; ++i) {
@@ -592,7 +592,7 @@
 
 static void test_addPoly(skiatest::Reporter* reporter) {
     SkPoint pts[32];
-    SkMWCRandom rand;
+    SkRandom rand;
 
     for (size_t i = 0; i < SK_ARRAY_COUNT(pts); ++i) {
         pts[i].fX = rand.nextSScalar1();
@@ -2035,7 +2035,7 @@
     }
 
     // Max of 10 segments, max 3 points per segment
-    SkMWCRandom rand(9876543);
+    SkRandom rand(9876543);
     SkPoint          expectedPts[31]; // May have leading moveTo
     SkPath::Verb     expectedVerbs[22]; // May have leading moveTo
     SkPath::Verb     nextVerb;