Change random number generator for tests to SkMWCRandom

tests/PathTest.cpp

Index: tests/PathTest.cpp
===================================================================
--- tests/PathTest.cpp	(revision 7902)
+++ tests/PathTest.cpp	(working copy)
@@ -290,7 +290,7 @@
 // Note: PathBench::ArbRoundRectBench performs almost exactly
 // the same test (but with drawing)
 static void test_arb_round_rect_is_convex(skiatest::Reporter* reporter) {
-    SkRandom rand;
+    SkMWCRandom rand;
     SkRect r;
 
     for (int i = 0; i < 5000; ++i) {
@@ -317,7 +317,7 @@
 // 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) {
-    SkRandom rand;
+    SkMWCRandom rand;
     SkRect r;
 
     for (int i = 0; i < 5000; ++i) {
@@ -452,7 +452,7 @@
 
 static void test_addPoly(skiatest::Reporter* reporter) {
     SkPoint pts[32];
-    SkRandom rand;
+    SkMWCRandom rand;
 
     for (size_t i = 0; i < SK_ARRAY_COUNT(pts); ++i) {
         pts[i].fX = rand.nextSScalar1();
@@ -1862,7 +1862,7 @@
     }
 
     // Max of 10 segments, max 3 points per segment
-    SkRandom rand(9876543);
+    SkMWCRandom rand(9876543);
     SkPoint          expectedPts[31]; // May have leading moveTo
     SkPath::Verb     expectedVerbs[22]; // May have leading moveTo
     SkPath::Verb     nextVerb;