Implement reducing the buffer count of a Surface.

Change-Id: I7f979c60c06d654aa8265002836277434bc1a64f
Bug: 3095167
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index caa6d17..07434cf 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -177,7 +177,8 @@
         sp<GraphicBuffer> detachBuffer(size_t index);
         status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer);
         // resize the number of active buffers
-        status_t resize(size_t size);
+        status_t resize(size_t size, const sp<SurfaceFlinger>& flinger,
+                EGLDisplay dpy);
 
         // ----------------------------------------------
         // must be called from GL thread