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/gm/ovals.cpp b/gm/ovals.cpp
index ae727b9..96e0488 100755
--- a/gm/ovals.cpp
+++ b/gm/ovals.cpp
@@ -125,7 +125,7 @@
         }
     }
 
-    SkColor genColor(SkMWCRandom* rand) {
+    SkColor genColor(SkRandom* rand) {
         SkScalar hsv[3];
         hsv[0] = SkFloatToScalar(rand->nextRangeF(0.0f, 360.0f));
         hsv[1] = SkFloatToScalar(rand->nextRangeF(0.75f, 1.0f));
@@ -135,7 +135,7 @@
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        SkMWCRandom rand(1);
+        SkRandom rand(1);
         canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
         SkRect oval = SkRect::MakeLTRB(-20, -30, 20, 30);