Draw n-patches using OpenGL.

Currently only tested with title bars and buttons.

Change-Id: I8263a9281898dc0e943b1b8412827fe55639b9d6
diff --git a/libs/hwui/LayerCache.h b/libs/hwui/LayerCache.h
index adc6713..2580551 100644
--- a/libs/hwui/LayerCache.h
+++ b/libs/hwui/LayerCache.h
@@ -50,7 +50,7 @@
      * Used as a callback when an entry is removed from the cache.
      * Do not invoke directly.
      */
-    void operator()(LayerSize& bitmap, Layer*& texture);
+    void operator()(LayerSize& size, Layer*& layer);
 
     /**
      * Returns the layer of specified dimensions. If not suitable layer