Get rid of DEFINE_TESTCLASS() macro.

src/core/SkTileGrid.h

Index: src/core/SkTileGrid.h
diff --git a/src/core/SkTileGrid.h b/src/core/SkTileGrid.h
index 77d972850fe7bb70fb14ca657bb92c3842e72968..bf3f6cfe02fe52428e9fa324b785d15de0b9fa93 100644
--- a/src/core/SkTileGrid.h
+++ b/src/core/SkTileGrid.h
@@ -69,6 +69,9 @@ public:
     enum {
         kTileFinished = -1,
     };
+
+    int tileCount(int x, int y);  // For testing only.
+
 private:
     SkTDArray<void*>& tile(int x, int y);
 
@@ -79,7 +82,6 @@ private:
     SkIRect fGridBounds;
     SkTileGridNextDatumFunctionPtr fNextDatumFunction;
 
-    friend class TileGridTest;
     typedef SkBBoxHierarchy INHERITED;
 };