Unclipped savelayer support in new renderer

bug:22480459

Change-Id: I89dd5de8d7d008a1e298d227d767aabff5c96e27
diff --git a/libs/hwui/renderstate/OffscreenBufferPool.h b/libs/hwui/renderstate/OffscreenBufferPool.h
index fac6c35..2d8d529 100644
--- a/libs/hwui/renderstate/OffscreenBufferPool.h
+++ b/libs/hwui/renderstate/OffscreenBufferPool.h
@@ -46,6 +46,8 @@
             uint32_t viewportWidth, uint32_t viewportHeight);
     ~OffscreenBuffer();
 
+    Rect getTextureCoordinates();
+
     // must be called prior to rendering, to construct/update vertex buffer
     void updateMeshFromRegion();