Remove GrRandom API in favor of SkRandom.

TEST=tests
R=bsalomon@google.com

Review URL: https://codereview.appspot.com/6855062

git-svn-id: http://skia.googlecode.com/svn/trunk@6539 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrRedBlackTree.h b/src/gpu/GrRedBlackTree.h
index 8187d81..5038bb0 100644
--- a/src/gpu/GrRedBlackTree.h
+++ b/src/gpu/GrRedBlackTree.h
@@ -943,14 +943,14 @@
 }
 #endif
 
-#include "GrRandom.h"
+#include "SkRandom.h"
 
 template <typename T, typename C>
 void GrRedBlackTree<T,C>::UnitTest() {
     GrRedBlackTree<int> tree;
     typedef GrRedBlackTree<int>::Iter iter;
 
-    GrRandom r;
+    SkRandom r;
 
     int count[100] = {0};
     // add 10K ints