reinstate black-screenshot debugging code

turned off by default.

Bug: 10809349
Change-Id: I3e6b8c7860e6b0e122b8f07de4020967cd1f005c
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 0cfc600..989e439 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -388,7 +388,7 @@
     void dumpAllLocked(const Vector<String16>& args, size_t& index, String8& result) const;
     bool startDdmConnection();
     static void appendSfConfigString(String8& result);
-    void checkScreenshot(const sp<GraphicBuffer>& buf, void const* vaddr,
+    void checkScreenshot(size_t w, size_t s, size_t h, void const* vaddr,
             const sp<const DisplayDevice>& hw,
             uint32_t minLayerZ, uint32_t maxLayerZ);