Address google3 compiler warning

https://codereview.appspot.com/7308063/



git-svn-id: http://skia.googlecode.com/svn/trunk@7655 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/DeferredCanvasTest.cpp b/tests/DeferredCanvasTest.cpp
index 8a834be..a052c2e 100644
--- a/tests/DeferredCanvasTest.cpp
+++ b/tests/DeferredCanvasTest.cpp
@@ -260,6 +260,9 @@
     int fStorageAllocatedChangedCount;
     int fFlushedDrawCommandsCount;
     int fSkippedPendingDrawCommandsCount;
+
+private:
+    typedef SkDeferredCanvas::NotificationClient INHERITED;
 };
 
 static void TestDeferredCanvasBitmapCaching(skiatest::Reporter* reporter) {