Restore code to draw backdrop and content nodes

bug: 26626661
Change-Id: I9e4dd41708e8ed93d3cf64242ad81815a653d269
diff --git a/libs/hwui/FrameBuilder.h b/libs/hwui/FrameBuilder.h
index 4fd39be..dea9934 100644
--- a/libs/hwui/FrameBuilder.h
+++ b/libs/hwui/FrameBuilder.h
@@ -59,6 +59,11 @@
             uint32_t viewportWidth, uint32_t viewportHeight,
             const std::vector< sp<RenderNode> >& nodes, const Vector3& lightCenter);
 
+    FrameBuilder(const LayerUpdateQueue& layers, const SkRect& clip,
+            uint32_t viewportWidth, uint32_t viewportHeight,
+            const std::vector< sp<RenderNode> >& nodes, const Vector3& lightCenter,
+            const Rect &contentDrawBounds);
+
     virtual ~FrameBuilder() {}
 
     /**