rolling back the experimental rollbacks in r2178-2179

git-svn-id: http://skia.googlecode.com/svn/trunk@2180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/pdf/SkPDFDevice.h b/include/pdf/SkPDFDevice.h
index 6a150a1..395968b 100644
--- a/include/pdf/SkPDFDevice.h
+++ b/include/pdf/SkPDFDevice.h
@@ -118,7 +118,7 @@
      *  clipped. A simple way to avoid the bug is to always draw the margin
      *  content last.
      */
-    void setDrawingArea(DrawingArea drawingArea);
+    SK_API void setDrawingArea(DrawingArea drawingArea);
 
     // PDF specific methods.