Add red black tree

Review URL: http://codereview.appspot.com/4184063



git-svn-id: http://skia.googlecode.com/svn/trunk@823 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/gr_unittests.cpp b/gpu/src/gr_unittests.cpp
index a9fd40d..8ef61b1 100644
--- a/gpu/src/gr_unittests.cpp
+++ b/gpu/src/gr_unittests.cpp
@@ -19,6 +19,7 @@
 #include "GrTDArray.h"
 #include "GrTBSearch.h"
 #include "GrMatrix.h"
+#include "GrRedBlackTree.h"
 
 static void dump(const GrTDArray<int>& array) {
 #if 0
@@ -31,7 +32,7 @@
 
 static void test_tdarray() {
     GrTDArray<int> array;
-    
+
     *array.append() = 0; dump(array);
     *array.append() = 2; dump(array);
     *array.append() = 4; dump(array);
@@ -138,6 +139,7 @@
     test_bsearch();
     test_clip();
     GrMatrix::UnitTest();
+    GrRedBlackTree<int>::UnitTest();
 }