Add device to top level N-way canvas.
Review URL: https://codereview.appspot.com/6131062

git-svn-id: http://skia.googlecode.com/svn/trunk@3811 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/utils/SkNWayCanvas.h b/include/utils/SkNWayCanvas.h
index 69c1fcf..dbf4a58 100644
--- a/include/utils/SkNWayCanvas.h
+++ b/include/utils/SkNWayCanvas.h
@@ -13,7 +13,7 @@
 
 class SkNWayCanvas : public SkCanvas {
 public:
-    SkNWayCanvas();
+    SkNWayCanvas(int width, int height);
     virtual ~SkNWayCanvas();
 
     void addCanvas(SkCanvas*);